Calculate the Greatest Common Factor or GCF of 1985
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The instructions to find the GCF of 1985 are the next:
1. Decompose all numbers into prime factors
1985 | 5 |
397 | 397 |
1 |
2. Write all numbers as the product of its prime factors
Prime factors of 1985 | = | 5 . 397 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 5 , 397
Common prime factors with the lowest exponent: 51, 3971
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 = 51. 3971 = 1985
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