What is the Greatest Common Factor of 9966 and 9978?

Greatest common factor (GCF) of 9966 and 9978 is 6.

GCF(9966,9978) = 6

We will now calculate the prime factors of 9966 and 9978, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 9966 and 9978.

How to find the GCF of 9966 and 9978?

We will first find the prime factorization of 9966 and 9978. After we will calculate the factors of 9966 and 9978 and find the biggest common factor number .

Step-1: Prime Factorization of 9966

Prime factors of 9966 are 2, 3, 11, 151. Prime factorization of 9966 in exponential form is:

9966 = 2¹ × 3¹ × 11¹ × 151¹

Step-2: Prime Factorization of 9978

Prime factors of 9978 are 2, 3, 1663. Prime factorization of 9978 in exponential form is:

9978 = 2¹ × 3¹ × 1663¹

Step-3: Factors of 9966

List of positive integer factors of 9966 that divides 9966 without a remainder.

1, 2, 3, 6, 11, 22, 33, 66, 151, 302, 453, 906, 1661, 3322, 4983

Step-4: Factors of 9978

List of positive integer factors of 9978 that divides 9966 without a remainder.

1, 2, 3, 6, 1663, 3326, 4989

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 9966 and 9978. The biggest common factor number is the GCF number.
So the greatest common factor 9966 and 9978 is 6.

Also check out the Least Common Multiple of 9966 and 9978