Someone disproved it. Here is his reason

if n = 28, then p = 127 is the
largest prime factor of 2^n-1, and n does not divide p-1.

所有跟帖： 

• Verified？ -乱弹- ♂ (0 bytes) () 07/23/2007 postreply 19:00:25

• 回复：Verified？ -也和话- ♂ (191 bytes) () 07/23/2007 postreply 20:58:46

• In that case the problem is not valid. Generally, -康MM- ♀ (371 bytes) () 07/24/2007 postreply 07:29:35

• 回复：In that case the problem is not valid. Generally, -yma16- ♂ (230 bytes) () 07/24/2007 postreply 08:01:34