What is the Greatest Common Factor of 11978 and 11986?

Greatest common factor (GCF) of 11978 and 11986 is 2.

GCF(11978,11986) = 2

We will now calculate the prime factors of 11978 and 11986, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 11978 and 11986.

How to find the GCF of 11978 and 11986?

We will first find the prime factorization of 11978 and 11986. After we will calculate the factors of 11978 and 11986 and find the biggest common factor number .

Step-1: Prime Factorization of 11978

Prime factors of 11978 are 2, 53, 113. Prime factorization of 11978 in exponential form is:

11978 = 2¹ × 53¹ × 113¹

Step-2: Prime Factorization of 11986

Prime factors of 11986 are 2, 13, 461. Prime factorization of 11986 in exponential form is:

11986 = 2¹ × 13¹ × 461¹

Step-3: Factors of 11978

List of positive integer factors of 11978 that divides 11978 without a remainder.

1, 2, 53, 106, 113, 226, 5989

Step-4: Factors of 11986

List of positive integer factors of 11986 that divides 11978 without a remainder.

1, 2, 13, 26, 461, 922, 5993

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 11978 and 11986. The biggest common factor number is the GCF number.
So the greatest common factor 11978 and 11986 is 2.

Also check out the Least Common Multiple of 11978 and 11986