All numbers have factors. Some numbers have some of the same factors as other numbers. These are known as common factors. The largest of these is known as the greatest common factor, or GCF.
Example: 30 and 42
The factors of 30 are:
1, 2, 3, 5, 6, 10, 15, 30
The factors of 42 are:
1, 2, 3, 6, 7, 14, 21, 42
The common factors are:
1, 2, 3, 6
The Greatest Common Factor:
GCF = 6
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The greatest common factor of the numbers 16 and 56 is 8.
The greatest common factor of the numbers 323 and 391 is 17.
The answer i can be many different numbers but 8 and 12 are the answer
The greatest common factor of two or more prime numbers is 1.
is known as the greatest common factor, or GCF.