Re: what makes it true?

> 1 is prime. Your statement is false.

Nope.

Today, the standard definition of a prime number is any positive integer
greater than 1 which has no divisors other than 1 and itself. This is good
because it makes the Fundamental Theorem of Arithmetic work out nicely. You
often need to multiple primes, which kind of sucks if you are multiplying by
1. In Gauss's time, 1 was included as a prime. But they eventually decided
to drop the unit from the club. But hey... its just a definition. Nothing to
get worked up about.


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