The book is now available! 61
(another Prime Pages' Curiosity)
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61! - 60! + 59! - 58! + ... + 5! - 4! + 3! - 2! + 1! is prime.

 

  Submitted: 2002-05-12 04:20:09;   Last Modified: 2008-07-31 07:29:39.



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