Greatest common divisor | Relatively prime
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Jan9-10, 02:03 PM
… d | n!
But we don't know what "n" is, so there does not seem to be any contradiction...?
ah, but you started with …
Proof by contradiction:
Suppose d is an integer greater than 1 that divides both n! + 1 and (n + 1)! +1
so … ?