What is the Greatest Common Factor of 159 and 171?

Greatest common factor (GCF) of 159 and 171 is 3.

GCF(159,171) = 3

We will now calculate the prime factors of 159 and 171, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 159 and 171.

How to find the GCF of 159 and 171?

We will first find the prime factorization of 159 and 171. After we will calculate the factors of 159 and 171 and find the biggest common factor number .

Step-1: Prime Factorization of 159

Prime factors of 159 are 3, 53. Prime factorization of 159 in exponential form is:

159 = 3¹ × 53¹

Step-2: Prime Factorization of 171

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

171 = 3² × 19¹

Step-3: Factors of 159

List of positive integer factors of 159 that divides 159 without a remainder.

1, 3, 53

Step-4: Factors of 171

List of positive integer factors of 171 that divides 159 without a remainder.

1, 3, 9, 19, 57

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 159 and 171. The biggest common factor number is the GCF number.
So the greatest common factor 159 and 171 is 3.

Also check out the Least Common Multiple of 159 and 171