Solutions by everydaycalculation.com

The GCF of 5 and 17 is 1.

- Find the prime factorization of 5

5 = 5 - Find the prime factorization of 17

17 = 17 - To find the GCF, multiply all the prime factors common to both numbers:

Therefore, GCF = 1

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Find hcf of: 10 & 34 15 & 51 25 & 85 35 & 119 10 & 17 5 & 34 15 & 17 5 & 51 25 & 17 5 & 85 35 & 17 5 & 119

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The greatest common factor (GCF) is also known as greatest common divisor (GCD) or highest common factor (HCF).

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