What is the Greatest Common Factor of 775 and 781?

Greatest common factor (GCF) of 775 and 781 is 1.

GCF(775,781) = 1

We will now calculate the prime factors of 775 and 781, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 775 and 781.

How to find the GCF of 775 and 781?

We will first find the prime factorization of 775 and 781. After we will calculate the factors of 775 and 781 and find the biggest common factor number .

Step-1: Prime Factorization of 775

Prime factors of 775 are 5, 31. Prime factorization of 775 in exponential form is:

775 = 5² × 31¹

Step-2: Prime Factorization of 781

Prime factors of 781 are 11, 71. Prime factorization of 781 in exponential form is:

781 = 11¹ × 71¹

Step-3: Factors of 775

List of positive integer factors of 775 that divides 775 without a remainder.

1, 5, 25, 31, 155

Step-4: Factors of 781

List of positive integer factors of 781 that divides 775 without a remainder.

1, 11, 71

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 775 and 781. The biggest common factor number is the GCF number.
So the greatest common factor 775 and 781 is 1.

Also check out the Least Common Multiple of 775 and 781