# How do you write the prime factorization of 81?

##### 1 Answer

Jan 6, 2017

#### Answer:

#### Explanation:

Prime factorization is where we take a number, such as 81, and break it down into its prime factors.

For instance,

9 is a factor of 81. But 9 isn't prime.

And so we can use that to rewrite what we started with:

The red is the prime factorization.