What is the Greatest Common Factor of 12963 and 12978?

Greatest common factor (GCF) of 12963 and 12978 is 3.

GCF(12963,12978) = 3

We will now calculate the prime factors of 12963 and 12978, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12963 and 12978.

How to find the GCF of 12963 and 12978?

We will first find the prime factorization of 12963 and 12978. After we will calculate the factors of 12963 and 12978 and find the biggest common factor number .

Step-1: Prime Factorization of 12963

Prime factors of 12963 are 3, 29, 149. Prime factorization of 12963 in exponential form is:

12963 = 3¹ × 29¹ × 149¹

Step-2: Prime Factorization of 12978

Prime factors of 12978 are 2, 3, 7, 103. Prime factorization of 12978 in exponential form is:

12978 = 2¹ × 3² × 7¹ × 103¹

Step-3: Factors of 12963

List of positive integer factors of 12963 that divides 12963 without a remainder.

1, 3, 29, 87, 149, 447, 4321

Step-4: Factors of 12978

List of positive integer factors of 12978 that divides 12963 without a remainder.

1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 103, 126, 206, 309, 618, 721, 927, 1442, 1854, 2163, 4326, 6489

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12963 and 12978. The biggest common factor number is the GCF number.
So the greatest common factor 12963 and 12978 is 3.

Also check out the Least Common Multiple of 12963 and 12978