prime numbers

1 is not prime, you missed out 2, and why is this under uni maths?

9 isn't prime either, its a square number!!

And you missed out 5 as well, the list of the first few primes is: 2,3,5,7,11 and arguable 1 but it is not accepted as prime by most people as it is not the sum of 1 and another no.