Calculate the Greatest Common Factor or GCF of 428
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The instructions to find the GCF of 428 are the next:
1. Decompose all numbers into prime factors
428 | 2 |
214 | 2 |
107 | 107 |
1 |
2. Write all numbers as the product of its prime factors
Prime factors of 428 | = | 22 . 107 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 2 , 107
Common prime factors with the lowest exponent: 22, 1071
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. 1071 = 428
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