What is the Greatest Common Factor of 809 and 817?

Greatest common factor (GCF) of 809 and 817 is 1.

GCF(809,817) = 1

We will now calculate the prime factors of 809 and 817, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 809 and 817.

How to find the GCF of 809 and 817?

We will first find the prime factorization of 809 and 817. After we will calculate the factors of 809 and 817 and find the biggest common factor number .

Step-1: Prime Factorization of 809

Prime factors of 809 are 809. Prime factorization of 809 in exponential form is:

809 = 809¹

Step-2: Prime Factorization of 817

Prime factors of 817 are 19, 43. Prime factorization of 817 in exponential form is:

817 = 19¹ × 43¹

Step-3: Factors of 809

List of positive integer factors of 809 that divides 809 without a remainder.

Step-4: Factors of 817

List of positive integer factors of 817 that divides 809 without a remainder.

1, 19, 43

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 809 and 817. The biggest common factor number is the GCF number.
So the greatest common factor 809 and 817 is 1.

Also check out the Least Common Multiple of 809 and 817