What is the Greatest Common Factor of 1131 and 1143?

Greatest common factor (GCF) of 1131 and 1143 is 3.

GCF(1131,1143) = 3

We will now calculate the prime factors of 1131 and 1143, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1131 and 1143.

How to find the GCF of 1131 and 1143?

We will first find the prime factorization of 1131 and 1143. After we will calculate the factors of 1131 and 1143 and find the biggest common factor number .

Step-1: Prime Factorization of 1131

Prime factors of 1131 are 3, 13, 29. Prime factorization of 1131 in exponential form is:

1131 = 3¹ × 13¹ × 29¹

Step-2: Prime Factorization of 1143

Prime factors of 1143 are 3, 127. Prime factorization of 1143 in exponential form is:

1143 = 3² × 127¹

Step-3: Factors of 1131

List of positive integer factors of 1131 that divides 1131 without a remainder.

1, 3, 13, 29, 39, 87, 377

Step-4: Factors of 1143

List of positive integer factors of 1143 that divides 1131 without a remainder.

1, 3, 9, 127, 381

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1131 and 1143. The biggest common factor number is the GCF number.
So the greatest common factor 1131 and 1143 is 3.

Also check out the Least Common Multiple of 1131 and 1143