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The greatest common factor (GCF) is often also called the greatest common divisor (GCD) or highest common factor (HCF). Keep in mind that these different terms all refer to the same thing: the largest integer which evenly divides two or more numbers.

The greatest common factor of 11 and 13 is 1
It is 1 because they are both prime numbers

11 and 13 have no common factors aside from 1. This is because both 11 and 13 are prime and 1 doesn't divide evenly into the other. Therefore the GCF is 1.

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9y ago

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