Enter GCF or LCM numbers:
Determine GCF(8,9)
GCF = Largest factor that divides numbers
Determine the factors for 8
1,2,4,8
Determine the factors for 9
1,3
List the common factors
1
GCF(8,9) = 1
GCF(8,9) = 1
Evaluate GCF
Since GCF = 1, they are relatively prime (co-prime)
Since GCF ≠ 1 and have a difference of two, the numbers are not twin prime
