Calculate the Greatest Common Factor or GCF of 15

The instructions to find the GCF of 15 are the next:

1. Decompose all numbers into prime factors

2. Write all numbers as the product of its prime factors

3. Choose the common prime factors with the lowest exponent

Common prime factors: 3 , 5

Common prime factors with the lowest exponent: 3¹, 5¹

4. Calculate the Greatest Common Factor or GCF

Remember, to find the GCF of several numbers you must multiply the common prime factors with the lowest exponent.

GCF = 3¹. 5¹ = 15

Also calculates the:

↑ Back to top