knightofdelta wrote:
heartbeats1987 wrote:
petrifiedbutstanding wrote:
Some folks here say 1 is not a prime. But it is.
Natural numbers that have EXACTLY two factors are called prime numbers. Obviously, the number "1" has exactly 1 factor, so it is neither prime nor composite.. Yeah, this number is a different breed
!!Right. So if I see "different breed" on a GMAT DS, I should think "1" right?
1 is NOT a prime number. The smallest prime is 2. And this is not only for the GMAT but generally.
For more check Number Theory chapter of our Math Book: math-number-theory-88376.html
Hope it helps.