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Topic: Help on 7^20 (mod 100)
Replies: 5   Last Post: Jul 5, 2007 11:23 AM

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Posts: 99
Registered: 2/24/07
Re: Help on 7^20 (mod 100)
Posted: Jul 4, 2007 4:31 PM
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student a écrit :

> yes, obviously 50^2 = 0 (mod 100), 2*50 = 0 (mod 100). so
> (7^4)^5=1(mod 100)


More genraly, to do such explicit computations, it's interesting to
compute the first few terms to see a possible simplification.

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