trough@ihuxa.UUCP (Chris Scussel) (10/22/83)
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