www.reference.com/article/number-2-prime-589a9996b96a8b2f

The number 2 is a prime number. It is the smallest prime number and the only even number that is prime. Its only two factors are 1 and 2.

www.reference.com/article/1-prime-number-d0c22610f491fbc4

The number 1 is not a prime number. A prime number by definition is a positive integer greater than 1 that is evenly divisible by only itself and 1.

www.reference.com/article/9-prime-number-c00180ebaaec359b

Nine is not a prime number. It is a composite number, because it has more than two factors. A prime number is only divisible by one and by itself, and nine is divisible by one and by nine, but it is also divisible by the number three.

www.reference.com/article/two-prime-number-e424a94a55b2cf3a

Two is a prime number. Two is the smallest prime number and the only even prime number, since all other even numbers divide by two.

www.reference.com/article/prime-factors-6-13cc3fb2eea92039

The prime factors of 6 are 2 and 3. The number 6 cannot be factorized into any other combination of prime numbers. A prime number is a whole number larger than 1 which can only be divided by 1 and itself.

www.reference.com/article/0-prime-number-1964bd6272594f3f

The number zero is not a prime number. By definition, a prime number dictates that the number must be a whole number greater in value than one and must be divisible by only itself and one.

www.reference.com/article/three-prime-number-1afcd9e48393dd43

The number 3 is a prime number. A prime number is a positive number that can only be divided evenly by the number 1 and itself.