Prime or Composite??

A prime number is a natural number that can be divided, without leaving
any remainder, by only itself and one. A prime number has only two factors,
itself and one.
For example, 5 can be divided, without a remainder, only by 5 and 1.
5 has exactly two natural number factors, 5 and 1.
5 is a prime number.

A composite number is an natural number that can be divided, without
leaving any remainder, by a natural number other than itself and one.
For example,
2 = 1 × 2 Prime
3 = 1 × 3 Prime
6 = 1 × 6 and 2 × 3 Composite
6 can be divided by 2 and by 3, so 6 is composite.
15 = 1 × 15 and 3 × 5 Composite
15 can be divided by 3 and by 5, so 15 is composite.