Mersenne primes

来源: yma16 于 2008-01-28 18:53:08 [] [旧帖] [给我悄悄话] 阅读数 : (206 bytes)

A Mersenne prime is a prime number of the form 2^n-1; for instance, 7 = 2^3-1.
Prove that if 2^n-1 is a prime then 2^n+1 is not a prime for n>2.
Is there a name for the primes of the form 2^n+1?

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• 回复：Mersenne primes -passenger101- ♂ 给 passenger101 发送悄悄话 (443 bytes) () 01/29/2008 postreply 09:07:51

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