What is the Greatest Common Factor of 7811 and 7821?

Greatest common factor (GCF) of 7811 and 7821 is 1.

GCF(7811,7821) = 1

We will now calculate the prime factors of 7811 and 7821, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 7811 and 7821.

How to find the GCF of 7811 and 7821?

We will first find the prime factorization of 7811 and 7821. After we will calculate the factors of 7811 and 7821 and find the biggest common factor number .

Step-1: Prime Factorization of 7811

Prime factors of 7811 are 73, 107. Prime factorization of 7811 in exponential form is:

7811 = 73¹ × 107¹

Step-2: Prime Factorization of 7821

Prime factors of 7821 are 3, 11, 79. Prime factorization of 7821 in exponential form is:

7821 = 3² × 11¹ × 79¹

Step-3: Factors of 7811

List of positive integer factors of 7811 that divides 7811 without a remainder.

1, 73, 107

Step-4: Factors of 7821

List of positive integer factors of 7821 that divides 7811 without a remainder.

1, 3, 9, 11, 33, 79, 99, 237, 711, 869, 2607

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 7811 and 7821. The biggest common factor number is the GCF number.
So the greatest common factor 7811 and 7821 is 1.

Also check out the Least Common Multiple of 7811 and 7821