- 251 (number)
251 is the natural number between 250 and 252. It is also a
prime number .In mathematics
251 is a
regular prime , anEisenstein prime , aChen prime , aGaussian prime , aSophie Germain prime , and asexy prime .251 is also sum of three consecutive primes (79 + 83 + 89) and sum of seven consecutive primes (23 + 29 + 31 + 37 + 41 + 43 + 47).
251 is also the smallest number that can be written as the sum of three cubes in two ways: 251 = 13 + 53 + 53 = 23 + 33 + 63.
In other fields
*
Vermont 251 Club is a club in which members try to visit each of the 251 towns and cities ofVermont .
*The number ofPokémon available inPokémon Gold and Silver is 251.
*"251" is a title of a play based onAnnabel Chong story, who became famous for engaging in 251 sex acts over ten hours period in January 1995, setting a world record as the world's biggest gang bang.
*251 is also the name of a very difficult Computer Science class at Carnegie Mellon University (the full name is 15-251). The homepage of this site is http://www.cs.cmu.edu/~15251/.
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