What is a a prime number

Any natural whole number that is only divisble by 1 and itself, examples would be 3, 5, 7, and 11.

A prime number is a whole number greater than 1 whose only factors are 1 and itself. A factor is a whole numbers that can be divided evenly into another number. The first few prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23 and 29