What is the Greatest Common Factor of 39961 and 39978?

Greatest common factor (GCF) of 39961 and 39978 is 1.

GCF(39961,39978) = 1

We will now calculate the prime factors of 39961 and 39978, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 39961 and 39978.

How to find the GCF of 39961 and 39978?

We will first find the prime factorization of 39961 and 39978. After we will calculate the factors of 39961 and 39978 and find the biggest common factor number .

Step-1: Prime Factorization of 39961

Prime factors of 39961 are 89, 449. Prime factorization of 39961 in exponential form is:

39961 = 89¹ × 449¹

Step-2: Prime Factorization of 39978

Prime factors of 39978 are 2, 3, 2221. Prime factorization of 39978 in exponential form is:

39978 = 2¹ × 3² × 2221¹

Step-3: Factors of 39961

List of positive integer factors of 39961 that divides 39961 without a remainder.

1, 89, 449

Step-4: Factors of 39978

List of positive integer factors of 39978 that divides 39961 without a remainder.

1, 2, 3, 6, 9, 18, 2221, 4442, 6663, 13326, 19989

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 39961 and 39978. The biggest common factor number is the GCF number.
So the greatest common factor 39961 and 39978 is 1.

Also check out the Least Common Multiple of 39961 and 39978