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312th
31 may refer to: * 31 (number) Years * 31 BC * AD 31 * 1931 CE ('31) * 2031 CE ('31) Music * Thirty One (Jana Kramer album), ''Thirty One'' (Jana Kramer album), 2015 * Thirty One (Jarryd James album), ''Thirty One'' (Jarryd James album), 2015 * "Thirty One", a song by Karma to Burn from the album ''Wild, Wonderful Purgatory'', 1999 Film and television * 31 (film), ''31'' (film), a 2016 horror film * 31 (Kazakhstan), a television channel * 31 Digital, an Australian video on demand service, and before 2017 an Australian community television channel from Brisbane, Queensland. Other uses * Thirty-one (card game) See also * * * * * Channel 31 (other) * Highway 31 (other) * Section 31 (other) * List of highways numbered 31 {{Numberdis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
31 (number)
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 results in 31. It is a lucky prime and a happy number; two properties it shares with 13, which is its dual emirp and permutable prime. 31 is also a primorial prime, like its twin prime, 29. 31 is the number of regular polygons with an odd number of sides that are known to be constructible with compass and straightedge, from combinations of known Fermat primes of the form 22''n'' + 1. 31 is the third Mersenne prime of the form 2''n'' − 1. It is also the eighth Mersenne prime exponent, specifically for the number 2,147,483,647, which is the maximum positive value for a 32-bit signed binary integer in computing. After 3, it is the second Mersenne prime not to be a double Mersenne prime. 127, which is the 31st prime number, is a do ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
