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From: leimkuhl@uiuccsb.UUCP
Newsgroups: net.math
Subject: Re: Mersenne primes and perfect numbers - (nf)
Message-ID: <3447@uiucdcs.UUCP>
Date: Wed, 26-Oct-83 20:38:32 EDT
Article-I.D.: uiucdcs.3447
Posted: Wed Oct 26 20:38:32 1983
Date-Received: Fri, 28-Oct-83 08:04:11 EDT
Lines: 13

#R:ihlts:-22100:uiuccsb:9700011:000:238
uiuccsb!leimkuhl    Oct 25 13:54:00 1983



In response 5 or 6 here, chongo writes:
	2^N - 1 is prime if and only if N is prime.

For those who don't know better, he meant:
	2^N - 1 is prime only if (but not neccessarily if) N is prime.

Ben Leimkuhler
(uiucdcs!uiuccsb!leimkuhl)