What is the Greatest Common Factor of 12905 and 12917?

Greatest common factor (GCF) of 12905 and 12917 is 1.

GCF(12905,12917) = 1

We will now calculate the prime factors of 12905 and 12917, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12905 and 12917.

How to find the GCF of 12905 and 12917?

We will first find the prime factorization of 12905 and 12917. After we will calculate the factors of 12905 and 12917 and find the biggest common factor number .

Step-1: Prime Factorization of 12905

Prime factors of 12905 are 5, 29, 89. Prime factorization of 12905 in exponential form is:

12905 = 5¹ × 29¹ × 89¹

Step-2: Prime Factorization of 12917

Prime factors of 12917 are 12917. Prime factorization of 12917 in exponential form is:

12917 = 12917¹

Step-3: Factors of 12905

List of positive integer factors of 12905 that divides 12905 without a remainder.

1, 5, 29, 89, 145, 445, 2581

Step-4: Factors of 12917

List of positive integer factors of 12917 that divides 12905 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12905 and 12917. The biggest common factor number is the GCF number.
So the greatest common factor 12905 and 12917 is 1.

Also check out the Least Common Multiple of 12905 and 12917