What is the Greatest Common Factor of 491 and 511?

Greatest common factor (GCF) of 491 and 511 is 1.

GCF(491,511) = 1

We will now calculate the prime factors of 491 and 511, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 491 and 511.

How to find the GCF of 491 and 511?

We will first find the prime factorization of 491 and 511. After we will calculate the factors of 491 and 511 and find the biggest common factor number .

Step-1: Prime Factorization of 491

Prime factors of 491 are 491. Prime factorization of 491 in exponential form is:

491 = 491¹

Step-2: Prime Factorization of 511

Prime factors of 511 are 7, 73. Prime factorization of 511 in exponential form is:

511 = 7¹ × 73¹

Step-3: Factors of 491

List of positive integer factors of 491 that divides 491 without a remainder.

Step-4: Factors of 511

List of positive integer factors of 511 that divides 491 without a remainder.

1, 7, 73

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 491 and 511. The biggest common factor number is the GCF number.
So the greatest common factor 491 and 511 is 1.

Also check out the Least Common Multiple of 491 and 511