What is the Greatest Common Factor of 66991 and 66999?

Greatest common factor (GCF) of 66991 and 66999 is 1.

GCF(66991,66999) = 1

We will now calculate the prime factors of 66991 and 66999, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 66991 and 66999.

How to find the GCF of 66991 and 66999?

We will first find the prime factorization of 66991 and 66999. After we will calculate the factors of 66991 and 66999 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 66999

Prime factors of 66999 are 3, 23, 971. Prime factorization of 66999 in exponential form is:

66999 = 3¹ × 23¹ × 971¹

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 66999

List of positive integer factors of 66999 that divides 66991 without a remainder.

1, 3, 23, 69, 971, 2913, 22333

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 66991 and 66999. The biggest common factor number is the GCF number.
So the greatest common factor 66991 and 66999 is 1.

Also check out the Least Common Multiple of 66991 and 66999