What is the Greatest Common Factor of 3951 and 3966?

Greatest common factor (GCF) of 3951 and 3966 is 3.

GCF(3951,3966) = 3

We will now calculate the prime factors of 3951 and 3966, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 3951 and 3966.

How to find the GCF of 3951 and 3966?

We will first find the prime factorization of 3951 and 3966. After we will calculate the factors of 3951 and 3966 and find the biggest common factor number .

Step-1: Prime Factorization of 3951

Prime factors of 3951 are 3, 439. Prime factorization of 3951 in exponential form is:

3951 = 3² × 439¹

Step-2: Prime Factorization of 3966

Prime factors of 3966 are 2, 3, 661. Prime factorization of 3966 in exponential form is:

3966 = 2¹ × 3¹ × 661¹

Step-3: Factors of 3951

List of positive integer factors of 3951 that divides 3951 without a remainder.

1, 3, 9, 439, 1317

Step-4: Factors of 3966

List of positive integer factors of 3966 that divides 3951 without a remainder.

1, 2, 3, 6, 661, 1322, 1983

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 3951 and 3966. The biggest common factor number is the GCF number.
So the greatest common factor 3951 and 3966 is 3.

Also check out the Least Common Multiple of 3951 and 3966