What is the Greatest Common Factor of 12939 and 12957?

Greatest common factor (GCF) of 12939 and 12957 is 3.

GCF(12939,12957) = 3

We will now calculate the prime factors of 12939 and 12957, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12939 and 12957.

How to find the GCF of 12939 and 12957?

We will first find the prime factorization of 12939 and 12957. After we will calculate the factors of 12939 and 12957 and find the biggest common factor number .

Step-1: Prime Factorization of 12939

Prime factors of 12939 are 3, 19, 227. Prime factorization of 12939 in exponential form is:

12939 = 3¹ × 19¹ × 227¹

Step-2: Prime Factorization of 12957

Prime factors of 12957 are 3, 7, 617. Prime factorization of 12957 in exponential form is:

12957 = 3¹ × 7¹ × 617¹

Step-3: Factors of 12939

List of positive integer factors of 12939 that divides 12939 without a remainder.

1, 3, 19, 57, 227, 681, 4313

Step-4: Factors of 12957

List of positive integer factors of 12957 that divides 12939 without a remainder.

1, 3, 7, 21, 617, 1851, 4319

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12939 and 12957. The biggest common factor number is the GCF number.
So the greatest common factor 12939 and 12957 is 3.

Also check out the Least Common Multiple of 12939 and 12957