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Topic: cotpi 67 - Composite factorial plus one
Replies: 7   Last Post: Mar 10, 2013 4:19 PM

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quasi

Posts: 10,325
Registered: 7/15/05
Re: cotpi 67 - Composite factorial plus one
Posted: Mar 8, 2013 1:24 AM
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cotpi wrote:

>How many positive integers n are there such that n! + 1 is
>composite?


Infinitely many.

Hint: Wilson's Theorem.

quasi



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