Enter GCF or LCM numbers:
Determine GCF(4,5)
GCF = Largest factor that divides numbers
Determine the factors for 4
1,2,4
Determine the factors for 5
1
List the common factors
1
GCF(4,5) = 1
GCF(4,5) = 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
