What is the Greatest Common Factor of 1257 and 1269?

Greatest common factor (GCF) of 1257 and 1269 is 3.

GCF(1257,1269) = 3

We will now calculate the prime factors of 1257 and 1269, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1257 and 1269.

How to find the GCF of 1257 and 1269?

We will first find the prime factorization of 1257 and 1269. After we will calculate the factors of 1257 and 1269 and find the biggest common factor number .

Step-1: Prime Factorization of 1257

Prime factors of 1257 are 3, 419. Prime factorization of 1257 in exponential form is:

1257 = 3¹ × 419¹

Step-2: Prime Factorization of 1269

Prime factors of 1269 are 3, 47. Prime factorization of 1269 in exponential form is:

1269 = 3³ × 47¹

Step-3: Factors of 1257

List of positive integer factors of 1257 that divides 1257 without a remainder.

1, 3, 419

Step-4: Factors of 1269

List of positive integer factors of 1269 that divides 1257 without a remainder.

1, 3, 9, 27, 47, 141, 423

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1257 and 1269. The biggest common factor number is the GCF number.
So the greatest common factor 1257 and 1269 is 3.

Also check out the Least Common Multiple of 1257 and 1269