GCF of 448 and 987

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Determine the Greatest Common Factor (GCF) of (448,987)

Determine the factors for 448 up to 448 since that is the minimum of the 2 numbers
1,2,4,7,8,14,16,28,32,56,64,112,224,448

Determine the factors for 987 up to 448 since that is the minimum of the 2 numbers
1,3,7,21,47,141,329

The common factors between them are 1,7
The greatest common factor between them is 7
Since the Greatest Common Factor of both numbers ≠ 1, the numbers are not relatively prime (co-prime)
Since the Greatest Common Factor of Both Numbers is both ≠ 1 and have a difference of two, the numbers are not twin prime