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Calculate the Greatest Common Factor or GCF of 72 and 3380

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The instructions to find the GCF of 72 and 3380 are the next:

1. Decompose all numbers into prime factors

722
362
182
93
33
1
33802
16902
8455
16913
1313
1

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

Prime factors of 72=23 . 32
Prime factors of 3380=22 . 5 . 132

3. Choose the common prime factors with the lowest exponent

Common prime factors: 2

Common prime factors with the lowest exponent: 22

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 = 22 = 4


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