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但如果2999999999!，指数就不能直接取模啊，（20）和（2**一个很大的数）肯定不一样啊

Posted by laisiwei at 2007-10-09 10:14:53
In Reply To:指数可以2分， X%M=0的时候可以强设成 X%M=M.. . n!%M, 当n>200的时候，结果为0(M) Posted by:bluewind at 2007-10-09 10:08:46

Followed by:

M=10^40, 999999999!%M=M， 2**999999999!= 2**M (0) bluewind 2007-10-09 10:17:06
- M=10，12%10=2，2**12=4096，2**2=4，最后一位不一样啊 (0) laisiwei 2007-10-09 10:35:35

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