# How do you write the prime factorization of 81?

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Parzival S.
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Nov 26, 2017

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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.

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