Calculate the Greatest Common Factor or GCF of 1691
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The instructions to find the GCF of 1691 are the next:
1. Decompose all numbers into prime factors
1691 | 19 |
89 | 89 |
1 |
2. Write all numbers as the product of its prime factors
Prime factors of 1691 | = | 19 . 89 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 19 , 89
Common prime factors with the lowest exponent: 191, 891
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 = 191. 891 = 1691
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