What is the Greatest Common Factor of 7780 and 7791?

Greatest common factor (GCF) of 7780 and 7791 is 1.

GCF(7780,7791) = 1

We will now calculate the prime factors of 7780 and 7791, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 7780 and 7791.

How to find the GCF of 7780 and 7791?

We will first find the prime factorization of 7780 and 7791. After we will calculate the factors of 7780 and 7791 and find the biggest common factor number .

Step-1: Prime Factorization of 7780

Prime factors of 7780 are 2, 5, 389. Prime factorization of 7780 in exponential form is:

7780 = 2² × 5¹ × 389¹

Step-2: Prime Factorization of 7791

Prime factors of 7791 are 3, 7, 53. Prime factorization of 7791 in exponential form is:

7791 = 3¹ × 7² × 53¹

Step-3: Factors of 7780

List of positive integer factors of 7780 that divides 7780 without a remainder.

1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 3890

Step-4: Factors of 7791

List of positive integer factors of 7791 that divides 7780 without a remainder.

1, 3, 7, 21, 49, 53, 147, 159, 371, 1113, 2597

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 7780 and 7791. The biggest common factor number is the GCF number.
So the greatest common factor 7780 and 7791 is 1.

Also check out the Least Common Multiple of 7780 and 7791