What is the Greatest Common Factor of 1309 and 1321?

Greatest common factor (GCF) of 1309 and 1321 is 1.

GCF(1309,1321) = 1

We will now calculate the prime factors of 1309 and 1321, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1309 and 1321.

How to find the GCF of 1309 and 1321?

We will first find the prime factorization of 1309 and 1321. After we will calculate the factors of 1309 and 1321 and find the biggest common factor number .

Step-1: Prime Factorization of 1309

Prime factors of 1309 are 7, 11, 17. Prime factorization of 1309 in exponential form is:

1309 = 7¹ × 11¹ × 17¹

Step-2: Prime Factorization of 1321

Prime factors of 1321 are 1321. Prime factorization of 1321 in exponential form is:

1321 = 1321¹

Step-3: Factors of 1309

List of positive integer factors of 1309 that divides 1309 without a remainder.

1, 7, 11, 17, 77, 119, 187

Step-4: Factors of 1321

List of positive integer factors of 1321 that divides 1309 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1309 and 1321. The biggest common factor number is the GCF number.
So the greatest common factor 1309 and 1321 is 1.

Also check out the Least Common Multiple of 1309 and 1321