What is the Greatest Common Factor of 621 and 641?

Greatest common factor (GCF) of 621 and 641 is 1.

GCF(621,641) = 1

We will now calculate the prime factors of 621 and 641, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 621 and 641.

How to find the GCF of 621 and 641?

We will first find the prime factorization of 621 and 641. After we will calculate the factors of 621 and 641 and find the biggest common factor number .

Step-1: Prime Factorization of 621

Prime factors of 621 are 3, 23. Prime factorization of 621 in exponential form is:

621 = 3³ × 23¹

Step-2: Prime Factorization of 641

Prime factors of 641 are 641. Prime factorization of 641 in exponential form is:

641 = 641¹

Step-3: Factors of 621

List of positive integer factors of 621 that divides 621 without a remainder.

1, 3, 9, 23, 27, 69, 207

Step-4: Factors of 641

List of positive integer factors of 641 that divides 621 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 621 and 641. The biggest common factor number is the GCF number.
So the greatest common factor 621 and 641 is 1.

Also check out the Least Common Multiple of 621 and 641