# Prime Factorization

Prime factorization is the factorization of a number into its constituent primes. Also called prime decomposition.

Prime factorization is an elementary-school-level concept. It is listed in the California State Standards for Grade 5.

### Prerequisites

Prime Factor: | A prime factor is a divisor that is also a prime number. |

Prime Number: | A prime number is a positive integer that has exactly one positive integer divisor other than 1 (i.e., no factors other than 1 and itself). Prime numbers are often simply called primes. |