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Aleph-0, the smallest infinite cardinal In mathematics, cardinal numbers, or cardinals for short, are a generalized kind of number used to denote the size of a set, known as its cardinality. ... In set theory, ordinal, ordinal number, and transfinite ordinal number refer to a type of number introduced by Georg Cantor in 1897, to accommodate infinite sequences and to classify sets with certain kinds of order structures on them. ... This article is about different methods of expressing numbers with symbols. ... Base-13, tridecimal, or tredecimal is a positional numeral system with thirteen as its base. ... ... In mathematics, a prime number (or a prime) is a natural number which has exactly two distinct natural number divisors: 1 and itself. ... In mathematics, a divisor of an integer n, also called a factor of n, is an integer which evenly divides n without leaving a remainder. ... The system of Roman numerals is a numeral system originating in ancient Rome, and was adapted from Etruscan numerals. ... The binary numeral system, or base-2 number system, is a numeral system that represents numeric values using two symbols, usually 0 and 1. ... The octal numeral system, or oct for short, is the base-8 number system, and uses the digits 0 to 7. ... The duodecimal (also known as base-12 or dozenal) system is a numeral system using twelve as its base. ... In mathematics and computer science, hexadecimal, base-16, or simply hex, is a numeral system with a radix, or base, of 16, usually written using the symbols 0â€“9 and Aâ€“F, or aâ€“f. ... Wiktionary (a portmanteau of wiki and dictionary) is a multilingual, Web-based project to create a free content dictionary, available in over 151 languages. ...

Thirteen is the 6th smallest prime number; the next is seventeen. 13 is the second Wilson prime. 13 is the fifth Mersenne prime exponent, yielding 8191. In mathematics, a prime number (or a prime) is a natural number which has exactly two distinct natural number divisors: 1 and itself. ... 17 (seventeen) is the natural number following 16 and preceding 18. ... In mathematics, a Wilson prime is a certain kind of prime number. ... In mathematics, a Mersenne number is a number that is one less than a power of two. ...

13 is the second star number and the seventh Fibonacci number. As it is an odd-indexed Fibonacci number, it is a Markov number, appearing in solutions to the "Markov Diophantine equation": (1, 5, 13), (1, 13, 34), (5, 13, 194), ... A star number, or centered 12-gonal number, is a centered figurate number that represents a centered hexagram, such as the one that Chinese checkers are played on. ... A tiling with squares whose sides are successive Fibonacci numbers in length A Fibonacci spiral, created by drawing arcs connecting the opposite corners of squares in the Fibonacci tiling shown above â€“ see golden spiral In mathematics, the Fibonacci numbers form a sequence defined by the following recurrence relation: That is... A Markov number or Markoff number is an integer x, y or z that is part of a solution to the Markov Diophantine equation The first few Markov numbers are 1, 2, 5, 13, 29, 34, 89, 169, 194, 233, 433, 610, 985, 1325, ... (sequence A002559 in OEIS) appearing in... In mathematics, a Diophantine equation is an indeterminate polynomial equation that allows the variables to be integers only. ...

13 is also the second happy prime, following 7, and the rethorical 1. A happy prime is a happy number that is prime. ...

There are 13 Archimedean solids. In geometry an Archimedean solid or semi-regular solid is a semi-regular convex polyhedron composed of two or more types of regular polygon meeting in identical vertices. ...

13 goes into 999,999 exactly 76,923 times, so vulgar fractions with 13 in the denominator have six digit repeating sequences in their decimal expansions. It is thus the smallest half period prime (sequence A097443 in OEIS) In arithmetic, a vulgar fraction (or common fraction) consists of one integer divided by a non-zero integer. ... A denominator is a name. ... In mathematics and computer science, a numerical digit is a symbol, e. ... For other uses, see Decimal (disambiguation). ... The On-Line Encyclopedia of Integer Sequences (OEIS) is an extensive searchable database of integer sequences, freely available on the Web. ...

13 is the largest number whose factorial is less than 1010. This means 13 is often the largest factorial a pocket calculator can represent without scientific notation. (This is not really a special pure mathematical property, because it requires 10 to be the "main base number" self-evidently.) For factorial rings in mathematics, see unique factorisation domain. ... For other uses, see Calculator (disambiguation). ... Scientific notation, also known as standard form, is a notation for writing numbers that is often used by scientists and mathematicians to make it easier to write large and small numbers. ...

At 13, the Mertens function sets a new low of -3, subseded later at 31 with a value of -4. In number theory, the Mertens function is where μ(k) is the Möbius function. ... 31 (thirty-one) is the natural number following 30 and preceding 32. ...

13 is the only positive integer that is the fourth root of the sum of the squares of two successive positive integers (119 and 120). 119 is the natural number following 118 and preceding 120. ... 120 (one hundred twenty in American English; one hundred and twenty in British English) is the natural number following 119 and preceding 121. ...

The 13th root is the most famous integer root calculation record, because 13 is the first prime number over 10 such that the last digit of a 13th integer power is the same as the last digit of its 13th root. Extracting the 13th root of a number is a famous category for the mental calculation world records. ... Extracting the 13th root of a number is a famous category for the mental calculation world records. ...

In base 10, the smallest prime with a composite sum of digits is 13.

13 is a repdigit in base 3 (111). In recreational mathematics, a repdigit is a natural number composed of repeated instances of the same digit, most often in the decimal numeral system. ...

Let ploggx denote the discrete logarithm according to the prime number p, i.e., the number l modulo p − 1 such that In mathematics, specifically in abstract algebra and its applications, discrete logarithms are group-theoretic analogues of ordinary logarithms. ... In mathematics, a prime number (or a prime) is a natural number which has exactly two distinct natural number divisors: 1 and itself. ...

$g^x equiv l pmod{p}.$

Then 13 is the only prime number p such that for any two primitive roots g and h, In mathematics, a prime number (or a prime) is a natural number which has exactly two distinct natural number divisors: 1 and itself. ... A primitive root modulo n is a concept from modular arithmetic in number theory. ...

$_pmathrm{log}_gh equiv _pmathrm{log}_hg pmod{p-1}.$

There exists an a periodic set of thirteen Wang tiles. Wang tiles (or Wang dominoes), first proposed by Hao Wang in 1961, are a class of formal systems. ...

The Primorial+1 : 13#+1=2*3*5*7*11*13+1 is the first number of the form n#+1 which is composite. For n ≥ 2, the primorial n# is the product of all prime numbers less than or equal to n. ...

Also, the first whole number to have the sum of its digits equal 13 and also be divisible by 13 is 247 (2+4+7=13)(13*19=247) There are 24 hours in a day and 7 days in a week. The next number to have these attributes is 364 (3+6+4)(13*28) This is one day less than a year. 13 flipped around is 31, which accounts for the number of days in most months.

## In science

On the periodic table of elements, aluminum has an atomic number of 13.

Aluminium table image created for Wikipedia by Schnee on June 24, 2003, 23:16 UTC. Licensed under the terms of the GNU FDL. File links The following pages link to this file: Aluminium User:Femto/elements e2 Categories: GFDL images ... Aluminium table image created for Wikipedia by Schnee on June 24, 2003, 23:16 UTC. Licensed under the terms of the GNU FDL. File links The following pages link to this file: Aluminium User:Femto/elements e2 Categories: GFDL images ... The periodic table of the chemical elements, also called the Mendeleev periodic table, is a tabular display of the known chemical elements. ... Aluminum is a soft and lightweight metal with a dull silvery appearance, due to a thin layer of oxidation that forms quickly when it is exposed to air. ... See also: List of elements by atomic number In chemistry and physics, the atomic number (also known as the proton number) is the number of protons found in the nucleus of an atom. ... Aluminum redirects here. ...

## In religion

### Christianity

• The number of participants at the Last Supper.
• Thirteen was once associated with the Epiphany by Christians, the child Jesus having received the Magi on his thirteenth day of life.

### Judaism

• In Judaism, 13 signifies the age at which a boy matures and becomes a Bar Mitzvah (Age of 12 for Girls, or Bat Mitzvah).
• The number of principles of Jewish faith according to Maimonides
• According to the Torah, God has 13 Attributes of Mercy
• In Mesoamerican Divination, 13 is the number of important cycles of fortune/misfortune.

This article or section does not cite its references or sources. ... When a Jewish child reaches the age of maturity (12 years and one day for girls, 13 years and one day for boys) that child becomes responsible for him/herself under Jewish law; at this point a boy is said to become Bar Mitzvah (בר מצווה, son of the commandment... There are a number of basic Jewish principles of faith that were formulated by medieval rabbinic authorities. ... Commonly used image indicating one artists conception of Maimonidess appearance Maimonides (March 30, 1135 or 1138â€“December 13, 1204) was a Jewish rabbi, physician, and philosopher in Spain, Morocco and Egypt during the Middle Ages. ... Template:Jews and Jewdaism Template:The Holy Book Named TorRah The Torah () is the most valuable Holy Doctrine within Judaism,(and for muslims) revered as the first relenting Word of Ulllah, traditionally thought to have been revealed to Blessed Moosah, An Apostle of Ulllah. ... This article discusses the term God in the context of monotheism and henotheism. ...

## A Significant Number

For various reasons 13 is considered a number carrying a special significance in many cultures.

### Unlucky 13

The stall numbers at the Santa Anita Park show that 13 is considered an unlucky number in horse racing.

Thirteen is regarded as an unlucky number in many cultures. Fear of the number 13 is termed triskaidekaphobia. The thirteenth of a month is likewise ominous, particularly when it falls on a Friday in some English-speaking cultures, Sweden, Russia and Germany (see Friday the 13th) or a Tuesday in the Greek and Spanish-speaking world. Image File history File linksMetadata Download high resolution version (2005x1371, 265 KB) Summary No number 13 wp:Santa Anita Park receiving barn showing superstition. ... Image File history File linksMetadata Download high resolution version (2005x1371, 265 KB) Summary No number 13 wp:Santa Anita Park receiving barn showing superstition. ... The Santa Anita track is set against the dramatic backdrop of the San Gabriel Mountains. ... Numerology is an arcane study of the purported mystical relationship between numbers and the character or action of physical objects and living things. ... The stall numbers at the Santa Anita Park. ... Friday the 13th is considered a day of bad luck in English-, French- and Portuguese-speaking countries around the world, as well as in Germany, The Netherlands, Belgium, Poland, Bulgaria, Sweden, Norway and Denmark. ... The god TÃ½r, identified with Mars, after whom Tuesday is named. ...

#### Suggested explanations

Thirteen may be considered a "bad" number simply because when a group of 13 objects or people is divided into two, three, four or six equal groups, there is always one leftover, or "unlucky", object or person.

It was suggested by Charles A. Platt writing in 1925 that the reason 13 is considered unlucky is that a person can count from 1-12 with their 8 fingers, two thumbs and 2 feet, but not beyond that, so the number 13 is unknown, hence frightening, hence unlucky.[1] This idea discounts the use of toes or other body parts in counting. Charles Adams Platt (New York October 16, 1861â€“Cornish, New Hampshire September 12, 1933 was a prominent landscape gardener and architect of the American Renaissance movement, who introduced formal gardens of Italianate design to an American audience, with his influential book Italian Gardens (1893). ...

Some Christian traditions have it that at the Last Supper, Judas Iscariot, the disciple who betrayed Jesus, was the 13th to sit at the table. For other uses, see The Last Supper (disambiguation). ... For other uses, see Judas. ... This article is about Jesus of Nazareth. ...

According to another interpretation, the number 13 is unlucky because it is the number of full moons in a contemporary year, but two full moons in a single calendar month (mistakenly referred to as a blue moon in a magazine article of the 1940s) only happens about every 5 years. The term blue moon has at least four related meanings. ...

Early nursery rhymes stated there were thirteen months in a year because of the natural moon cycle that was used to count the lunar year. In England, a calendar of thirteen months of 28 days each, plus one extra day, known as "a year and a day" was still in use up to Tudor times. A nursery rhyme is a traditional song or poem taught to young children, originally in the nursery. ... Since there are about twelve lunations (synodic months) in a solar year, this period (354. ... For other uses, see England (disambiguation). ... Allegory of the Tudor dynasty (detail), attributed to Lucas de Heere, c. ...

In Tarot decks, the 13th card of the Major Arcana is Death. While Death is rarely interpreted literally, it is possible that this furthered the perception of 13 as an unlucky number. This article is about the general history, iconography, and uses of tarot cards. ... The Major Arcana (Trumps Major, Major Trumps) of the Tarot deck consists of 22 cards. ... Death (XIII) Death (XIII) is a trump card in the tarot deck. ...

Another hypothesis about the origin of Friday the 13th as an unlucky day is attributed to this being the day that the Knights Templar were slaughtered in a collaboration between King Philip IV of France and Pope Clement V finishing with the burning at the stake of Jacques De Molay. For other uses, see Knights Templar (disambiguation). ... â€œPhilip the Fairâ€ redirects here. ... Clement V, born Bertrand de Goth (also occasionally spelled Gouth and Got) (1264 â€“ April 20, 1314), was Pope from 1305 to his death. ... Jacques de Molay (est. ...

The legion with which Julius Caesar crossed the Rubicon was the Legio XIII Gemina or the 13th legion. Legion can refer to: Roman legion, a division of troops within the Roman army Legion (demon), a demon found in the Christian Bible in Mark 5:9 and Luke 8:30 The American Legion, A veterans organization in the United States A creature from Castlevania Category: ... For other uses, see Julius Caesar (disambiguation). ... Presumed course of the Rubicon For other uses, see Rubicon (disambiguation). ... Sestertius minted in 248 by Philip the Arab to celebrate Dacia province and its legions, V Macedonica and XIII Gemina. ...

13 is the 6th prime number. 6 is sometimes considered an unlucky number due to its association with 666. Look up six in Wiktionary, the free dictionary. ... 666 is an abundant number. ...

#### Examples

Inside of a Lufthansa plane with row numbers going straight from 12 to 14.

Some aeroplanes skip a row 13, going straight from 12 to 14.[2] Deutsche Lufthansa AG (ISIN: DE0008232125) (pronounced ) is the largest airline in Europe in terms of overall passengers carried (second is Air France - KLM), and the flag carrier of Germany. ...

Some tall buildings have resorted to skipping the "thirteenth floor", either by numbering it "14"[3] or as "12a"[citation needed]. In many buildings in the U.S. and Canada, there is no thirteenth floor. ...

Some streets do not contain a house number 13.

In many cultures, getting married on any day of the week that falls under number 13 is highly discouraged.

There is a superstition that should thirteen sit at a table to dine, one will die in the next year. This prompted the formation of The Thirteen Club to debunk it. In 1880s, The Thirteen Club was created to debunk the superstition of 13 at a table being unlucky. ...

The Code of Hammurabi, a collection of laws created ca. 1760 BC, does not contain a thirteenth law. An inscription of the Code of Hammurabi. ... BC may stand for: Before Christ (see Anno Domini) : an abbreviation used to refer to a year before the beginning of the year count that starts with the supposed year of the birth of Jesus. ...

On the 13th day of the Persian new year (Norouz), people consider staying at home unlucky, and go outside for a picnic in order to ward off the bad luck. This article is about the Persian people, an ethnic group found mainly in Iran. ... Persepolis all nations stair case. ...

Most race car drivers consider 13 a very unlucky number, as a car carrying that number has never won the Indianapolis 500 or a NASCAR Nextel Cup race, and almost all Formula 1 teams are no longer given the number 13 when car numbers are given out to teams on basis of points. Usually the team finishing seventh in the previous year's championship will take numbers 14 and 15, instead of 13 and 14. Only once in recent years (1991, Ricky Johnson) has an AMA Motocross rider chosen #13 instead of #14. Some NASCAR tracks refuse to have a pit stall #13. â€œIndy 500â€ redirects here. ... The NASCAR Championship is the championship held in NASCARs top stock car racing series. ... Formula One, abbreviated to F1 and also known as Grand Prix racing, is the highest class of single-seat open-wheel auto racing. ...

Microsoft plans to skip Office 13 for being "an unlucky number," going directly from Office 12 to Office 14. [1] Microsoft Office is an office suite from Microsoft for Microsoft Windows and Apple Mac OS X operating systems. ...

The creators of the online game Kingdom of Loathing avoid the number 13 in all of their programming. Kingdom of Loathing (KoL) is a humorous, browser-based, multiplayer role playing game designed and operated by Asymmetric Publications, including creator Zack Jick Johnson and writer Josh Mr. ...

The College of William and Mary claims 13 priorities, or achievements of the academic world, which they accomplished before any other university or college in the United States. For example, William and Mary was the first college in the US to establish an honor code. A marble plaque commemorating these 13 priorities hangs on the exterior wall of the Wren Building, the nation's oldest academic building still in continuous use. Today, the Wren Building houses the college's Religious Studies department. The College of William and Mary in Virginia is a public, liberal-arts university located in Williamsburg, Virginia. ... The Wren Building is a highly notable building on the campus of the College of William and Mary in Williamsburg, Virginia. ...

The Apollo 13 spacecraft malfunctioned after being launched on April 13th at 13:13 CST, forcing it to return to Earth without a landing on the moon and imperiling its crew. Original crew photo. ...  CST or UTC-6 The Central Standard Time Zone (CST) is a geographic region in the Americas that keeps time by subtracting six hours from UTC (UTC-6). ...

After 13 years of being the richest man in the world, Microsoft Corporation chairman Bill Gates lost this title. According to Forbes magazine's 2008 list of the world's billionaires.[2] Microsoft Corporation, (NASDAQ: MSFT, HKSE: 4338) is a multinational computer technology corporation with global annual revenue of US\$44. ... For other persons named Bill Gates, see Bill Gates (disambiguation). ... Alternate meaning: For the Boston Brahmin family associated with John Forbes Kerry, see Forbes family. ...

On the first two albums by the Avant-Garde metal band Fantômas, Track 13 has no title, is unlisted on the album cover and consists of a few seconds of silence. Avant-garde metal or experimental metal is generally regarded as a cross-genre reference to metal bands or more exactly as a stylistic adjunction with specific traits (just like Progressive-, Symphonic-, Viking-, Pagan-, Folk-, Industrial-). It is characterized by large amounts of experimentation and by non-standard sounds, instruments, and... FantÃ´mas is an avant-garde metal band formed in 1998 in California, United States. ...

### Lucky 13

In Sikhism, the number 13 is considered a special number since 13 is tera in Punjabi, which also means "yours" (as in, "I am yours, O Lord"). The legend goes that when Guru Nanak Dev was taking stock of items as part of his employment with a village merchant, he counted from 1 to 13 (in Punjabi) as one does normally; and thereafter he would just repeat "tera", since all items were God's creation. The merchant confronted Guru Nanak about this, but found everything to be in order after the inventory was checked. April 13 also usually turns out to be Vaisakhi every year, which is the Sikh New Year and the major Sikh Holiday. Sikhism (IPA: or ; Punjabi: , , IPA: ), founded on the teachings of Guru Nanak Dev and nine successive gurus in fifteenth century Northern India, is the fifth-largest religion in the world. ... Punjabi (also Panjabi; in GurmukhÄ«, PanjÄbÄ« in ShÄhmukhÄ«) is the language of the Punjab regions of India and Pakistan. ... Guru Nanak Dev[1] (Punjabi: , ) (Born in Nankana Sahib, Punjab, (now Pakistan) on 15th April 1469 â€“ 7 May 1539, Kartarpur, Punjab, India), was the founder of Sikhism, and the first of the eleven Sikh Gurus. ... Guru Nanak (Gurmukhi: ਗੁਰੂ ਨਾਨਕ, Devanagari: गुरु नानक) (20 October 1469 - 7 May 1539), the founder of Sikhism and the first of the ten Gurus of the Sikhs, was born in the village of Talwandi, now called Nankana Sahib, near Lahore in present-day Pakistan. ... Vaisakhi (Punjabi: , , also known as Baisakhi) is an ancient harvest festival in Punjab, which also marks beginning of a new solar year, and new harvest season. ...

In Italy, 13 is also considered to be a lucky number.

Colgate University also considers 13 to be a lucky number. They were founded in 1817 by 13 men with 13 dollars, 13 prayers, and 13 articles. (To this day, members of the Colgate community consider the number 13 a good omen.) In fact, the campus address is 13 Oak Drive in Hamilton, NY and the all men a capella group is called the Colgate 13. Colgate University is a highly selective, private liberal arts college located in the Village of Hamilton in Madison County, New York, USA. It was founded in 1819 as a Baptist seminary, but has since become non-denominational. ...

## In mythology

• The number of circles, or "nodes", that make up Metatron's Cube.
• The number of Norse gods (there were 12) at a banquet that was crashed by the evil spirit Loki (making 13) who killed Baldr with an arrow/spear made out of mistletoe using Hodr, thus marking the beginning of Ragnarok.
• This example uses Osage, but it could be applied to other social groups, like the Norse. '13' is the sum of two social groups - male and female. Thus, 6 + 7, even and odd, right and left, north and south, sky and land, yin and yang...make up a totality. To view the image of the rising sun or source of all life, one faces east. Then the right side necessarily faces south. In early counting systems, masculine hierarchy goes from south to north, while feminine hierarchy gets arranged from north to south. In Osage, one codes for each element (water, land, and sky), six animals (lynx, grey wolf, male puma, male black bear, buffalo bull, and elk and their antagonists (young male deer with curved horns, young male deer with grey horns, full grown male deer, with dark horns, hummock full of little bugs, high bank?, a plant whose blossoms always look up to the sun (Silphium lacinatum). The seventh animal, a deer, has no antagonist and that completes the asymmetry. The deer was fundamental for the survival of the tribe. So a taboo was to speak about the most sacred 13th element, the deer, before hunting them. In modern societies, the original meaning of 13 evolved over time and changed into a new meaning. In this case, the bad luck connotations represent an example of a symbolic inversion. [4]

For the Darkwell album, see Metatron (album). ... For other uses, see Loki (disambiguation). ... Balder redirects here. ... Look up Ragnarok in Wiktionary, the free dictionary. ...

## Age 13

• In Jewish tradition a boy becomes bar mitzvah at age 13, when a ceremony is held and the boy reads from the Torah for the first time. Girls may also celebrate their bat mitzvah at age 13 in many Conservative and Reform Jewish congregations.
• Youngest a minor can watch a PG-13 rated movie by the MPAA without the recommendation of parental guidance or parental consent. Anyone can purchase, rent or buy tickets to a PG-13 rated movie.
• Youngest age a minor can rent or purchase a T rated game by the ESRB without parental consent although anyone can rent or buy a T rated game without an adult.
• Minimum age a person can buy a 13+ rated movie in the Canadian province of Quebec without an adult 16 or older.

An anglophone is someone who speaks English natively or by adoption. ... â€œYoung Menâ€ redirects here. ... When a Jewish child reaches the age of maturity (12 years and one day for girls, 13 years and one day for boys) that child becomes responsible for him/herself under Jewish law; at this point a boy is said to become Bar Mitzvah (בר מצווה, son of the commandment... Template:Jews and Jewdaism Template:The Holy Book Named TorRah The Torah () is the most valuable Holy Doctrine within Judaism,(and for muslims) revered as the first relenting Word of Ulllah, traditionally thought to have been revealed to Blessed Moosah, An Apostle of Ulllah. ... When a Jewish child reaches the age of maturity (12 years and one day for girls, 13 years and one day for boys) that child becomes responsible for him/herself under Jewish law; at this point a boy is said to become Bar Mitzvah (בר מצווה, son of the commandment... The Motion Picture Association of America (MPAA) is a non-profit trade association formed to advance the interests of movie studios. ... The Entertainment Software Rating Board (ESRB) is a self-regulatory organization that applies and enforces ratings, advertising guidelines, and online privacy principles for computer and video games in the United States. ...

## In sports

There are 13 players in a rugby league team. In rugby union one of the centres, most often but not always the outside centre, wears the 13 shirt Rugby league football is a full-contact team sport played with a prolate spheroid-shaped ball by two teams of thirteen on a rectangular grass field. ... For other uses, see Rugby (disambiguation). ...

Basketball Hall of Famer Wilt Chamberlain wore number 13. Three NBA teams, plus the Harlem Globetrotters, have retired his number. Wilton Norman Wilt Chamberlain (August 21, 1936â€“October 12, 1999), nicknamed Wilt the Stilt and The Big Dipper, was an American professional National Basketball Association (NBA) basketball player for the Philadelphia / San Francisco Warriors, the Philadelphia 76ers and the Los Angeles Lakers; and also played for the Harlem Globetrotters. ... For the animated television series, see Harlem Globetrotters (TV series). ...

Pro Football Hall of Fame quarterback Dan Marino wore number 13 for the Miami Dolphins, who retired his number in 2000. Daniel Constantine Marino, Jr. ... League/Conference affiliations American Football League (1966â€“1969) Eastern Division (1966â€“1969) National Football League (1970â€“present) American Football Conference (1970â€“present) AFC East (1970â€“present) Current uniform Team colors Aqua, Coral, Navy, White Mascot T. D. Personnel Owner H. Wayne Huizenga (50%) and Stephen M. Ross (50%) General Manager...

New York Jets wide receiver Don Maynard wore number 13 for the New York Jets, who retired his number in 1972. City East Rutherford, New Jersey Other nicknames Gang Green, the Green and White, Jersey Jets Team colors Hunter green and white Head Coach Eric Mangini Owner Woody Johnson General manager Mike Tannenbaum League/Conference affiliations American Football League (1960-1969) Eastern Division (1960-1969) National Football League (1970â€“present) American... The very first New York Titan, Don Maynard (born 1935) of Texas Western College (now University of Texas at El Paso) was an example of the lack of player-evaluation skills of NFL teams in the 1960s. ...

Chelsea FC football midfielder and Germany's National Captain Michael Ballack wears the number 13 jersey. Chelsea Football Club (also known as the Blues, previously also known as the Pensioners), founded in 1905, is a Premier League football team that plays at Stamford Bridge football ground in west London. ... Michael Ballack (born September 26, 1976 in GÃ¶rlitz, Saxony) is a German football player. ...

In Formula 1, no driver has had the number 13 on his car since 1976. Formula One, abbreviated to F1 and also known as Grand Prix racing, is the highest class of single-seat open-wheel auto racing. ...

## In other fields

• The number of original colonies the United States was founded from. The original flag had thirteen stars, one for each state. New stars have since been added whenever a new state joins the union, but the idea of adding stripes for new states was soon dropped, so the American flag to this day has thirteen horizontal stripes: six white ones and seven red ones.
• In the Great Seal of the United States there are 13 olive leaves (with 13 olives), 13 arrows, and 13 stars. These form a triangle over the eagle with the number 13 on each point.
• The number of guns in a gun salute to U.S. Army, Air Force and Marine Corps Major Generals, and Navy and Coast Guard Rear Admirals Upper Half.
• The original number of members of The Thirteen Club.
• The number of loaves in a "baker's dozen"
• There are traditionally thirteen steps leading up to a gallows. It is, however, an urban myth that there are thirteen turns in a hangman's noose (there are most commonly eight turns.)
• Rondeau is a poem with 13 lines.
• Julius Caesar crossed the Rubicon with the 13th Legion, marking the beginning of Caesar's civil war and the eventual death of the Roman Republic.
• Trece is the Spanish word for thirteen; the number 13 is used to identify members of 13th St Sureños - chicano gang members in the U.S. that identify themselves with la Eme - the Mexican Mafia.
• Princess Diana died when her car hit the thirteenth pillar of a tunnel in Paris, on August 31, 1997.
• There is a Latin American gang named MS-13.
• In the mythology of the the television program, Battlestar Galactica, Earth is the 13th colony, lost after humanity left their planet of origin, Kobol, and created the Twelve Colonies

## Historical years

13 B.C., A.D. 13, 1913, 2013, 13th century (1201-1300), 1300s (14th century) Centuries: 2nd century BC - 1st century BC - 1st century Decades: 60s BC 50s BC 40s BC 30s BC 20s BC - 10s BC - 0s 10s 20s 30s 40s Years: 18 BC 17 BC 16 BC 15 BC 14 BC 13 BC 12 BC 11 BC 10 BC 9 BC 8 BC... This article is about the year 13. ... Year 1913 (MCMXIII) was a common year starting on Wednesday (link will display the full calendar) of the Gregorian calendar (or a common year starting on Tuesday of the 13-day-slower Julian calendar). ... 2013 (MMXIII) will be a common year starting on Tuesday of the Gregorian calendar. ... (12th century - 13th century - 14th century - other centuries) As a means of recording the passage of time, the 13th century was that century which lasted from 1201 to 1300. ... This 14th-century statue from south India depicts the gods Shiva (on the left) and Uma (on the right). ...

## References

1. ^ Lachenmeyer, Nathaniel (2004). 13: The Story of the World's Most Popular Superstition. Thunder's Mouth Press. ISBN 1568583060.  Reviewed by Michael Kerrigan, "One must die".
2. ^ David Grossman. "Check your travel superstitions, or carry them on?". USA Today, 31 October 2005.
3. ^ John H. Conway and Richard K. Guy, The Book of Numbers. New York: Copernicus (1996): 11. "Hotel floors are often numbered 1, 2, ... 12, 14, 15, ..."
4. ^ Levi-Strauss, Claude (1966), The Savage Mind, pp. 145-146.
USA Today is a national American daily newspaper published by the Gannett Company. ... is the 304th day of the year (305th in leap years) in the Gregorian calendar. ... Year 2005 (MMV) was a common year starting on Saturday (link displays full calendar) of the Gregorian calendar. ...

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 13 (number) - Wikipedia, the free encyclopedia (2240 words) 13 is the only positive integer that is the fourth root of the sum of the squares of two successive positive integers (119 and 120). The 13th root is the most famous integer root calculation record, because 13 is the first prime number over 10 such as the last digit of a 13th integer power is the same as the last digit of its 13th root. The number is also considered unlucky by some as it is the sum of 1+4+5+3, the year of the fall of Constantinople to the Turks, marking the end of the Byzantine Empire, though it may be considered lucky by Turks on the same basis.
 Triskaidekaphobia - Wikipedia, the free encyclopedia (1288 words) Thirteen may be considered a "bad" number simply because it is one more than 12, which is a popularly used number in many cultures (due to it being a highly composite number). Some buildings number their floors so as to skip the thirteenth floor entirely, jumping from floor 12 to floor 14 in order to avoid distressing triskaidekaphobics, or using 12 and 12b instead. Interestingly, "13" is often considered a lucky number in these cultures since the word "three," pronounced "san," is similar to the pronunciation of the word "live" or "survive" in Chinese and Korean.
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