5
![Illustration by [[Leonardo da Vinci](https://upload.wikimedia.org/wikipedia/commons/f/f4/De_divina_proportione_-_Illustration_13%2C_crop.jpg)
5 (five) is a number, numeral and digit. It is the natural number, and cardinal number, following 4 and preceding 6, and is a prime number.
Five is the third-smallest prime number, equal to the sum of the only consecutive positive integers to also be prime numbers (2 + 3). In integer sequences, five is also the second Fermat prime, and the third Mersenne prime exponent, as well as the fourth or fifth Fibonacci number; 5 is the first congruent number, as well as the length of the hypotenuse of the smallest integer-sided right triangle, making part of the smallest Pythagorean triple (3, 4, 5).
In geometry, the regular five-sided pentagon is the first regular polygon that does not tile the plane with copies of itself, and it is the largest face that any of the five regular three-dimensional regular Platonic solid can have, as represented in the regular dodecahedron. For curves, a conic is determined using five points in the same way that two points are needed to determine a line.
In abstract algebra and the classification of finite simple groups, five is the count of exceptional Lie groups as well as the number of Mathieu groups that are sporadic groups. Five is also, more elementarily, the number of properties that are used to distinguish between the four fundamental number systems used in mathematics, which are rooted in the real numbers.
Historically, 5 has garnered attention throughout history in part because distal extremities in humans typically contain five digits. Provided by Wikipedia
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101by Alexander Wilhelm Armin Kellner, Tiago Rodrigues Simões, Douglas Riff, Orlando Grillo, Pedro Romano, Helder de Paula, Renato Ramos, Marcelo Carvalho, Juliana Sayão, Gustavo Oliveira, Taissa RodriguesGet access
Published in Polar Research (2011)
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103by Institut des sciences de la mer de Rimouski (ISMER), 310 allée des Ursulines, Rimouski, QC G5L 3A1, Canada ( host institution ), Barletta, F. ( author ), St-Onge, G. ( author ), Channell, J.E.T. ( author ), Rochon, A. ( author )Get access
Published in Quaternary Science Reviews (2010)
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111by Schulz, K., Kadko, D., Mohrholz, V., Stephens, M., Fer, I., 3 Applied Research Center Florida International University Miami FL USA, 4 Leibniz Institute for Baltic Sea Research, Physical Oceanography and Instrumentation Rostock Germany, 5 Geophysical Institute University of Bergen and Bjerknes Centre for Climate Research Bergen NorwayGet access
Published in Journal of Geophysical Research: Oceans (2023)
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112by Paz, A., Bellanger, J.-M., Lavoise, C., Molia, A., \xc5\x81awrynowicz, M., Larsson, E., Ibarguren, I.O., Jeppson, M., L\xc3\xa6ss\xc3\xb8e, T. (Thomas), Sauve, M., Richard, F., Moreau, P.-A. (Pierre-Arthur)Get access
Published in Persoonia - Molecular Phylogeny and Evolution of Fungi (2017)
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113by Lee, Y. J., Kopparla, P., Peralta, J., Schröder, S. E., Imamura, T., Kouyama, T., Watanabe, S., 2 GSFS The University of Tokyo Kashiwa Campus Kashiwa Japan, 3 ISAS/JAXA Sagamihara Japan, 4 DLR Berlin Germany, 5 AIST Tokyo Japan, 6 Space Information Center Hokkaido Information University Ebetsu JapanGet access
Published in Journal of Geophysical Research: Planets (2020)
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115by Linderholm, HW (Linderholm, Hans W.)1, Ou, TH (Ou, Tinghai)1,2, Jeong, JH (Jeong, Jee-Hoon)1, Folland, CK (Folland, Chris K.)3, Gong, DY (Gong, Daoyi)4, Liu, HB (Liu, Hongbin)5, Liu, Y (Liu, Yu)6, Chen, DL (Chen, Deliang)1Get access
Published in Journal of Geophysical Research (2011)
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117by R J Res, 3, T Gibbs, E, J W Baker, W D Lavelle, 5, I D Gardner, M J Walsh, S Richardson, W, J R V Pegau, K J Zaneveld, E Voss, J Boss, D, J A Bogucki, R E Domaradzki, C R Ecke, V Truman, G Krivtsov, Mitchelson-JacobGet access
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118by R J Res, 3, T Gibbs, E, J W Baker, W D Lavelle, 5, I D Gardner, M J Walsh, S Richardson, W, J R V Pegau, K J Zaneveld, E Voss, J Boss, D, J A Bogucki, R E Domaradzki, C R Ecke, V Truman, G Krivtsov, Mitchelson-JacobGet access
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119by Liu, Y (Liu, Yi) 1,2, Peng, ZC (Peng, Zicheng) 1, Shen, CC (Shen, Chuan-Chou) 3, Zhou, RJ (Zhou, Renjun) 4, Song, SH (Song, Shaohua) 2, Shi, ZG (Shi, Zhengguo) 2, Chen, T (Chen, Tegu) 5, Wei, GJ (Wei, Gangjian) 6, DeLong, KL (DeLong, Kristine L.) 7Get access
Published in Geophysical Research Letters (2013)
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