What is the Greatest Common Factor of 30905 and 30909?

Greatest common factor (GCF) of 30905 and 30909 is 1.

GCF(30905,30909) = 1

We will now calculate the prime factors of 30905 and 30909, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 30905 and 30909.

How to find the GCF of 30905 and 30909?

We will first find the prime factorization of 30905 and 30909. After we will calculate the factors of 30905 and 30909 and find the biggest common factor number .

Step-1: Prime Factorization of 30905

Prime factors of 30905 are 5, 7, 883. Prime factorization of 30905 in exponential form is:

30905 = 5¹ × 7¹ × 883¹

Step-2: Prime Factorization of 30909

Prime factors of 30909 are 3, 10303. Prime factorization of 30909 in exponential form is:

30909 = 3¹ × 10303¹

Step-3: Factors of 30905

List of positive integer factors of 30905 that divides 30905 without a remainder.

1, 5, 7, 35, 883, 4415, 6181

Step-4: Factors of 30909

List of positive integer factors of 30909 that divides 30905 without a remainder.

1, 3, 10303

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 30905 and 30909. The biggest common factor number is the GCF number.
So the greatest common factor 30905 and 30909 is 1.

Also check out the Least Common Multiple of 30905 and 30909