What is the Greatest Common Factor of 12991 and 12999?

Greatest common factor (GCF) of 12991 and 12999 is 1.

GCF(12991,12999) = 1

We will now calculate the prime factors of 12991 and 12999, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12991 and 12999.

How to find the GCF of 12991 and 12999?

We will first find the prime factorization of 12991 and 12999. After we will calculate the factors of 12991 and 12999 and find the biggest common factor number .

Step-1: Prime Factorization of 12991

Prime factors of 12991 are 11, 1181. Prime factorization of 12991 in exponential form is:

12991 = 11¹ × 1181¹

Step-2: Prime Factorization of 12999

Prime factors of 12999 are 3, 7, 619. Prime factorization of 12999 in exponential form is:

12999 = 3¹ × 7¹ × 619¹

Step-3: Factors of 12991

List of positive integer factors of 12991 that divides 12991 without a remainder.

1, 11, 1181

Step-4: Factors of 12999

List of positive integer factors of 12999 that divides 12991 without a remainder.

1, 3, 7, 21, 619, 1857, 4333

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12991 and 12999. The biggest common factor number is the GCF number.
So the greatest common factor 12991 and 12999 is 1.

Also check out the Least Common Multiple of 12991 and 12999