Proof that:

gcd (n!+1 , (n+1)! + 1) = 1

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- Sep 14th 2009, 07:03 PM #1

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- Sep 14th 2009, 11:13 PM #2

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Suppose that there exists a such that . If then where c is an integer. Using this . Now look at . If we come to the conclussion that but this is impossible since so p=1 and this is a contradiction so there exist no number p such that p divides and and it follows that