What is the Greatest Common Factor of 143 and 156?

Greatest common factor (GCF) of 143 and 156 is 13.

GCF(143,156) = 13

We will now calculate the prime factors of 143 and 156, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 143 and 156.

How to find the GCF of 143 and 156?

We will first find the prime factorization of 143 and 156. After we will calculate the factors of 143 and 156 and find the biggest common factor number .

Step-1: Prime Factorization of 143

Prime factors of 143 are 11, 13. Prime factorization of 143 in exponential form is:

143 = 11¹ × 13¹

Step-2: Prime Factorization of 156

Prime factors of 156 are 2, 3, 13. Prime factorization of 156 in exponential form is:

156 = 2² × 3¹ × 13¹

Step-3: Factors of 143

List of positive integer factors of 143 that divides 143 without a remainder.

1, 11, 13

Step-4: Factors of 156

List of positive integer factors of 156 that divides 143 without a remainder.

1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 143 and 156. The biggest common factor number is the GCF number.
So the greatest common factor 143 and 156 is 13.

Also check out the Least Common Multiple of 143 and 156