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Calculate the Greatest Common Factor or GCF of 778

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The instructions to find the GCF of 778 are the next:

1. Decompose all numbers into prime factors

7782
389389
1

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

Prime factors of 778=2 . 389

3. Choose the common prime factors with the lowest exponent

Common prime factors: 2 , 389

Common prime factors with the lowest exponent: 21, 3891

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 = 21. 3891 = 778


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