What is the Greatest Common Factor of 257 and 268?

Greatest common factor (GCF) of 257 and 268 is 1.

GCF(257,268) = 1

We will now calculate the prime factors of 257 and 268, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 257 and 268.

How to find the GCF of 257 and 268?

We will first find the prime factorization of 257 and 268. After we will calculate the factors of 257 and 268 and find the biggest common factor number .

Step-1: Prime Factorization of 257

Prime factors of 257 are 257. Prime factorization of 257 in exponential form is:

257 = 257¹

Step-2: Prime Factorization of 268

Prime factors of 268 are 2, 67. Prime factorization of 268 in exponential form is:

268 = 2² × 67¹

Step-3: Factors of 257

List of positive integer factors of 257 that divides 257 without a remainder.

Step-4: Factors of 268

List of positive integer factors of 268 that divides 257 without a remainder.

1, 2, 4, 67, 134

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 257 and 268. The biggest common factor number is the GCF number.
So the greatest common factor 257 and 268 is 1.

Also check out the Least Common Multiple of 257 and 268