1) Find the remainder of the division of 15! with 17(adsbygoogle = window.adsbygoogle || []).push({});

2) If (n^2)+2 prime show that 3 divides n

3)If p the smallest divisor for n show that there exist integers a and b such that an+b(p-1)=1

4) For every n>1 show that n does not divide (2^n)-1

Any help?

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# Homework Help: Number Theory

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