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Calculate the Greatest Common Factor or GCF of 72 and 2856

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The instructions to find the GCF of 72 and 2856 are the next:

1. Decompose all numbers into prime factors

722
362
182
93
33
1
28562
14282
7142
3573
1197
1717
1

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

Prime factors of 72=23 . 32
Prime factors of 2856=23 . 3 . 7 . 17

3. Choose the common prime factors with the lowest exponent

Common prime factors: 2 , 3

Common prime factors with the lowest exponent: 23, 31

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. 31 = 24


Also calculates the:

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