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From: Henry on 9 May 2010 17:09
On 9 May, 16:11, "H.Y. ADDANDSTUFF" <marty.musa...(a)gmail.com> wrote:
> 2*2 ^ N -1=Prime
> 2*2^606-1=Prime?
> True
> N=606
> N+1=607
> SO 2^607-1  MP
> 607 IS A MERSENNE PRIME!
> HTTP://MEAMI.ORG/

Usual nonsense. What is the conjecture?

"If 2^n - 1 is prime then n is prime" is provable
since if n = a*b then 2^n-1 is divisible by 2^a-1
(and so also by 2^b-1).

All numbers of the form 2^n-1 are called Mersenne numbers and
the prime ones are called Mersenne primes. You have replaced n by N+1.

It has been known since 1952 that 2^607-1 is prime and so a Mersenne
prime.
607 is prime but not a Mersenne prime,
since it is more than 2^9-1 but less than 2^10-1.

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