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Calculate the Greatest Common Factor or GCF of 72 and 2997

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The instructions to find the GCF of 72 and 2997 are the next:

1. Decompose all numbers into prime factors

722
362
182
93
33
1
29973
9993
3333
1113
3737
1

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

Prime factors of 72=23 . 32
Prime factors of 2997=34 . 37

3. Choose the common prime factors with the lowest exponent

Common prime factors: 3

Common prime factors with the lowest exponent: 32

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 = 32 = 9


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