A factor of a number is a number you multiply by another factor to get a number. For example, a factor of 6 is 3 because 3 × 2 = 6, and a factor of 12 is 4 because 4 × 3 = 12. A prime number is a number that only has two factors, 1 and itself, which every number has. Examples of prime numbers are 13, 5, 47, 93, etc. Let me know if you still don't get it!