sta staf <sta_staf@...> wrote:

> sory i mean n+1 is the second odd after n

But that's ludicrous, even by your low

> is personel expersion (sory)

> p = (2^n)-1 : is mersenne numbre :

> if (p - (n+2)) /n = prime ...

standards of coherence, since Fermat's

little theorem shows that

(2^n - 1 - (n+2))/n

is not an integer when n is prime.

David