What is the Greatest Common Factor of 66991 and 66997?

Greatest common factor (GCF) of 66991 and 66997 is 1.

GCF(66991,66997) = 1

We will now calculate the prime factors of 66991 and 66997, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 66991 and 66997.

How to find the GCF of 66991 and 66997?

We will first find the prime factorization of 66991 and 66997. After we will calculate the factors of 66991 and 66997 and find the biggest common factor number .

Step-1: Prime Factorization of 66991

Prime factors of 66991 are 31, 2161. Prime factorization of 66991 in exponential form is:

66991 = 31¹ × 2161¹

Step-2: Prime Factorization of 66997

Prime factors of 66997 are 7, 17, 563. Prime factorization of 66997 in exponential form is:

66997 = 7¹ × 17¹ × 563¹

Step-3: Factors of 66991

List of positive integer factors of 66991 that divides 66991 without a remainder.

1, 31, 2161

Step-4: Factors of 66997

List of positive integer factors of 66997 that divides 66991 without a remainder.

1, 7, 17, 119, 563, 3941, 9571

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 66991 and 66997. The biggest common factor number is the GCF number.
So the greatest common factor 66991 and 66997 is 1.

Also check out the Least Common Multiple of 66991 and 66997