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Topic: Conjecture Prime
Replies: 33   Last Post: Apr 26, 2013 7:21 AM

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Re: Conjecture Prime
Posted: Jun 25, 2009 2:25 AM
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> 2n * 2 (n+1) - 1 is prime
>
> it's pretty easy to show if n = 1 or 5 (mod 7) then 7
> will divide the
> whole thing


I never wrote this:

> 2n * 2 (n+1) - 1 is prime

I write: [[N*N]*([N*N]+2)]-1



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