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Calculate the Greatest Common Factor or GCF of 427

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The instructions to find the GCF of 427 are the next:

1. Decompose all numbers into prime factors

4277
6161
1

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

Prime factors of 427=7 . 61

3. Choose the common prime factors with the lowest exponent

Common prime factors: 7 , 61

Common prime factors with the lowest exponent: 71, 611

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 = 71. 611 = 427


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