Prime Factorization of 81:

Express the composite number as a product of its prime factors.

Draw the possible factor trees.

The prime factorization of 81 is  3 · 3 · 3 · 3 .  or 3⁴ .

Note: Both trees give same reuslt. Prime facots are unique to a particular number.

The prime factorization of 81 is  3 · 3 · 3 · 3 .  or 3⁴ .