What is the Greatest Common Factor of 12966 and 12980?

Greatest common factor (GCF) of 12966 and 12980 is 2.

GCF(12966,12980) = 2

We will now calculate the prime factors of 12966 and 12980, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12966 and 12980.

How to find the GCF of 12966 and 12980?

We will first find the prime factorization of 12966 and 12980. After we will calculate the factors of 12966 and 12980 and find the biggest common factor number .

Step-1: Prime Factorization of 12966

Prime factors of 12966 are 2, 3, 2161. Prime factorization of 12966 in exponential form is:

12966 = 2¹ × 3¹ × 2161¹

Step-2: Prime Factorization of 12980

Prime factors of 12980 are 2, 5, 11, 59. Prime factorization of 12980 in exponential form is:

12980 = 2² × 5¹ × 11¹ × 59¹

Step-3: Factors of 12966

List of positive integer factors of 12966 that divides 12966 without a remainder.

1, 2, 3, 6, 2161, 4322, 6483

Step-4: Factors of 12980

List of positive integer factors of 12980 that divides 12966 without a remainder.

1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 59, 110, 118, 220, 236, 295, 590, 649, 1180, 1298, 2596, 3245, 6490

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12966 and 12980. The biggest common factor number is the GCF number.
So the greatest common factor 12966 and 12980 is 2.

Also check out the Least Common Multiple of 12966 and 12980