Determine the Greatest Common Factor (GCF) of (256,225)

1,2,4,8,16,32,64,128

1,3,5,9,15,25,45,75,225

The common factors between them are 1

The greatest common factor between them is

Since the Greatest Common Factor of both numbers is 1, the numbers are said to be 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

To see the LCM of these numbers, click the LCM button above