thirty-one
31 (thirty-one) is the natural number following 30 and preceding 32. It is a prime number.
In mathematics
31 is the 11th prime number. It is a superprime and a self prime (after 3, 5, and 7), as no integer added up to its base 10 digits ...
, which is also a primorial prime. Twenty-nine is also the sixth Sophie Germain prime.
* 29 is the sum of three consecutive squares, 22 + 32 + 42.
* 29 is a Lucas prime, a
Pell prime
In mathematics, the Pell numbers are an infinite sequence of integers, known since ancient times, that comprise the denominators of the closest rational approximations to the square root of 2. This sequence of approximations begins , , , , a ...
, and a
tetranacci number In mathematics, the Fibonacci numbers form a sequence defined recursively by:
:F_n =
\begin
0 & n = 0 \\
1 & n = 1 \\
F_ + F_ & n > 1
\end
That is, after two starting values, each number is the sum of the two preceding numbers.
The Fibonacci sequ ...
.
* 29 is an Eisenstein prime with no imaginary part and real part of the form 3n − 1. 29 is also the 10th supersingular prime.
* None of the first 29 natural numbers have more than two different prime factors. This is the longest such consecutive sequence.
* 29 is a Markov number, appearing in the solutions to ''x'' + ''y'' + ''z'' = 3''xyz'': , , , , etc.
* 29 is a
Perrin number
In mathematics, the Perrin numbers are defined by the recurrence relation
: for ,
with initial values
:.
The sequence of Perrin numbers starts with
: 3, 0, 2, 3, 2, 5, 5, 7, 10, 12, 17, 22, 29, 39, ...
The number of different maxima ...
, preceded in the sequence by 12, 17, 22.
* 29 is the smallest positive whole number that cannot be made from the numbers , using each exactly once and using only addition, subtraction, multiplication, and division.
* 29 is the number of pentacubes if reflections are considered distinct.
Religion
* The Bishnois community follows 29 principles. Guru Jambheshwar had laid down 29 principles to be followed by the sect in 1485 A.D. In Hindi, Bish means 20 and noi means 9; thus, Bishnoi translates as Twenty-niners.
* The number of
sura
A ''surah'' (; ar, سورة, sūrah, , ), is the equivalent of "chapter" in the Qur'an. There are 114 ''surahs'' in the Quran, each divided into '' ayats'' (verses). The chapters or ''surahs'' are of unequal length; the shortest surah ('' Al-K ...
constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
The origins of the e ...
New General Catalogue
The ''New General Catalogue of Nebulae and Clusters of Stars'' (abbreviated NGC) is an astronomical catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888. The NGC contains 7,840 objects, including galaxies, star clusters and ...
spiral galaxy
Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work ''The Realm of the Nebulae''Andromeda.
* The lunar month is very close to twenty-nine days.
*
Saturn
Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius of about nine and a half times that of Earth. It has only one-eighth the average density of Earth; h ...
requires over 29 years to orbit the Sun.
* The number of days
February
February is the second month of the year in the Julian and Gregorian calendars. The month has 28 days in common years or 29 in leap years, with the 29th day being called the ''leap day''. It is the first of five months not to have 31 days (th ...
Turkish
Turkish may refer to:
*a Turkic language spoken by the Turks
* of or about Turkey
** Turkish language
*** Turkish alphabet
** Turkish people, a Turkic ethnic group and nation
*** Turkish citizen, a citizen of Turkey
*** Turkish communities and mi ...
Swedish
Swedish or ' may refer to:
Anything from or related to Sweden, a country in Northern Europe. Or, specifically:
* Swedish language, a North Germanic language spoken primarily in Sweden and Finland
** Swedish alphabet, the official alphabet used by ...
29th Regiment of Foot
The 29th (Worcestershire) Regiment of Foot was an infantry regiment of the British Army, raised in 1694. Under the Childers Reforms it amalgamated with the 36th (Herefordshire) Regiment of Foot to become the 1st Battalion, the Worcestershire Reg ...
, a former regiment in the British Army
* Marine Corps Air Ground Combat Center Twentynine Palms, affectionately referred to by Marines as "Twentynine Stumps".Stephen F. Tomajczyk, ''To Be a U.S. Marine''. New York: Zenith Imprint (2004): 155. "Twenty-nine stumps—Slang for Twenty-nine Palms Marine Corps Air-Ground Combat Center, located in California's Mojave Desert."
* Boeing B-29, a large bomber
Music and entertainment
* "$29.00" is a song on the album '' Blue Valentine'' by Tom Waits.
* '' 29'', an album by Ryan Adams.
* "No. 29", a song about a washed-up high school football star from the album '' Exit 0'' by Steve Earle.
* The track from which the '' Chattanooga Choo Choo'' train departs in the
Glenn Miller
Alton Glen Miller (March 1, 1904 – December 15, 1944) was an American big band founder, owner, conductor, composer, arranger, trombone player and recording artist before and during World War II, when he was an officer in the United States Arm ...
song.
* The number of attributes existing according to The Strokes in " You Only Live Once".
* A track from Bon Iver's album, ''
22, A Million
''22, A Million'' is the third studio album by American indie folk band Bon Iver, released on September 30, 2016. Recorded in lead member Justin Vernon's April Base studio in Eau Claire, Wisconsin, the album marks a major shift in the band's soun ...
'', all tracks being numerically themed.
* A 2022 song by American singer-songwriter
Demi Lovato
Demetria Devonne Lovato ( ; born August 20, 1992), known as Demi Lovato, is an American singer, songwriter, and actress. After appearing on the children's television series ''Barney & Friends'' (2002–2004), Lovato rose to prominence for pl ...
mountain bike
A mountain bike (MTB) or mountain bicycle is a bicycle designed for off-road cycling. Mountain bikes share some similarities with other bicycles, but incorporate features designed to enhance durability and performance in rough terrain, which ...
with 29-inch wheels.
* 29 is the highest possible score in a hand of Cribbage or Khanhoo.
* The Atlanta Braves set the National League record for most runs scored in a game as they scored 29 times against the
Miami Marlins
The Miami Marlins are an American professional baseball team based in Miami. The Marlins compete in Major League Baseball (MLB) as a member club of the National League (NL) East division. The club's home ballpark is LoanDepot Park.
The franc ...
on September 9, 2020.
History
* ''The Twenty-nine'' is often used in New Zealand for the missing miners and contractors believed to have been killed in the Pike River Mine disaster in November 2010.
See also
*
List of highways numbered 29
The following highways are numbered 29:
Canada
* Alberta Highway 29
* British Columbia Highway 29
* Manitoba Highway 29 (former)
* Ontario Highway 29
* Saskatchewan Highway 29
Czech Republic
* I/29 Highway; Czech: Silnice I/29
India
* Nat ...