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From: trough@ihuxa.UUCP (Chris Scussel)
Newsgroups: net.math
Subject: Re: Mersenne primes, if and only if
Message-ID: <313@ihuxa.UUCP>
Date: Fri, 21-Oct-83 18:04:09 EDT
Article-I.D.: ihuxa.313
Posted: Fri Oct 21 18:04:09 1983
Date-Received: Sat, 22-Oct-83 15:09:41 EDT
Organization: AT&T Bell Labs, Naperville, Il
Lines: 7

A recent news item stated that 2^n-1 is prime if and only if n is prime.
n being prime is necessary, but not sufficient (e.g. 2^11-1 = 23*89).
This was doubtless simply a misstatement.

				Chris Scussel
				Bell Labs
				Naperville, Ill