What is the Greatest Common Factor of 1247 and 1258?

Greatest common factor (GCF) of 1247 and 1258 is 1.

GCF(1247,1258) = 1

We will now calculate the prime factors of 1247 and 1258, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1247 and 1258.

How to find the GCF of 1247 and 1258?

We will first find the prime factorization of 1247 and 1258. After we will calculate the factors of 1247 and 1258 and find the biggest common factor number .

Step-1: Prime Factorization of 1247

Prime factors of 1247 are 29, 43. Prime factorization of 1247 in exponential form is:

1247 = 29¹ × 43¹

Step-2: Prime Factorization of 1258

Prime factors of 1258 are 2, 17, 37. Prime factorization of 1258 in exponential form is:

1258 = 2¹ × 17¹ × 37¹

Step-3: Factors of 1247

List of positive integer factors of 1247 that divides 1247 without a remainder.

1, 29, 43

Step-4: Factors of 1258

List of positive integer factors of 1258 that divides 1247 without a remainder.

1, 2, 17, 34, 37, 74, 629

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1247 and 1258. The biggest common factor number is the GCF number.
So the greatest common factor 1247 and 1258 is 1.

Also check out the Least Common Multiple of 1247 and 1258