Calculate the Greatest Common Factor or GCF of 921
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The instructions to find the GCF of 921 are the next:
1. Decompose all numbers into prime factors
921 | 3 |
307 | 307 |
1 |
2. Write all numbers as the product of its prime factors
Prime factors of 921 | = | 3 . 307 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 3 , 307
Common prime factors with the lowest exponent: 31, 3071
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 = 31. 3071 = 921
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