What is the Greatest Common Factor of 12305 and 12309?

Greatest common factor (GCF) of 12305 and 12309 is 1.

GCF(12305,12309) = 1

We will now calculate the prime factors of 12305 and 12309, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12305 and 12309.

How to find the GCF of 12305 and 12309?

We will first find the prime factorization of 12305 and 12309. After we will calculate the factors of 12305 and 12309 and find the biggest common factor number .

Step-1: Prime Factorization of 12305

Prime factors of 12305 are 5, 23, 107. Prime factorization of 12305 in exponential form is:

12305 = 5¹ × 23¹ × 107¹

Step-2: Prime Factorization of 12309

Prime factors of 12309 are 3, 11, 373. Prime factorization of 12309 in exponential form is:

12309 = 3¹ × 11¹ × 373¹

Step-3: Factors of 12305

List of positive integer factors of 12305 that divides 12305 without a remainder.

1, 5, 23, 107, 115, 535, 2461

Step-4: Factors of 12309

List of positive integer factors of 12309 that divides 12305 without a remainder.

1, 3, 11, 33, 373, 1119, 4103

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12305 and 12309. The biggest common factor number is the GCF number.
So the greatest common factor 12305 and 12309 is 1.

Also check out the Least Common Multiple of 12305 and 12309