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发表于 2005-12-27 22:48:15
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2^2147483647-1=MM31 已经发现四个因数 (因数p = 2*k*M31+1)
295257526626031 k=68745, Warut Roonguthai (Guy Haworth 1983)
87054709261955177 k = 20269004, Tony Forbes (Wilfrid Keller 1994)
242557615644693265201 k = 56474845800, Reto Keiser 1999 Dec 6
178021379228511215367151 k = 41448832329225, Ernst Mayer 2005 June 20
参考:http://hogranch.com/pipermail/prime/2005-June/000738.html
[ Last edited by zhaokanghu on 2005-12-27 at 23:02 ] |
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