I've forgotten the message that spawned the thread, but I'll expose my incompetence in math to say that I was also thinking that 1 is prime. The informal definition that I remember says that a number is prime if it is an integer evenly divisible only by itself and 1. Well, 1 clearly is divisible by itself (1/1 = 1) and divisible by 1 (1/1 = 1), so by that informal definition, it must be prime. The perils of natural language and informal definitions.
;; Gary ============================================================ FRIAM Applied Complexity Group listserv Meets Fridays 9a-11:30 at cafe at St. John's College lectures, archives, unsubscribe, maps at http://www.friam.org
