GCF of 34 and 85

Number 1Number 2(Optional) Enter Number 3

Determine the Greatest Common Factor (GCF) of (34,85)

Determine the factors for 34 up to 34 since that is the minimum of the 2 numbers
1,2,17,34

Determine the factors for 85 up to 34 since that is the minimum of the 2 numbers
1,5,17

The common factors between them are 1,17
The greatest common factor between them is 17
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
To see the LCM of these numbers, click the LCM button above