Calculate the Greatest Common Factor or GCF of 680

The instructions to find the GCF of 680 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: 2 , 5 , 17

Common prime factors with the lowest exponent: 2³, 5¹, 17¹

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 = 2³. 5¹. 17¹ = 680

Also calculates the:

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