Question

What is a prime factor?

Answer 1

Prime factors are factors of a number that are, themselves, prime numbers.

Example: the prime factor of 15 are 3 and 5 because 3x5=15 and they are both prime numbers.

Answer 2

Prime factors are factors of a number that are, themselves, prime numbers. There are many methods to find the prime factors of a number, but one of the most common is to use a prime factor tree.