What is the Greatest Common Factor of 171 and 191?

Greatest common factor (GCF) of 171 and 191 is 1.

GCF(171,191) = 1

We will now calculate the prime factors of 171 and 191, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 171 and 191.

How to find the GCF of 171 and 191?

We will first find the prime factorization of 171 and 191. After we will calculate the factors of 171 and 191 and find the biggest common factor number .

Step-1: Prime Factorization of 171

Prime factors of 171 are 3, 19. Prime factorization of 171 in exponential form is:

171 = 3² × 19¹

Step-2: Prime Factorization of 191

Prime factors of 191 are 191. Prime factorization of 191 in exponential form is:

191 = 191¹

Step-3: Factors of 171

List of positive integer factors of 171 that divides 171 without a remainder.

1, 3, 9, 19, 57

Step-4: Factors of 191

List of positive integer factors of 191 that divides 171 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 171 and 191. The biggest common factor number is the GCF number.
So the greatest common factor 171 and 191 is 1.

Also check out the Least Common Multiple of 171 and 191