What is the Greatest Common Factor of 1280 and 1298?

Greatest common factor (GCF) of 1280 and 1298 is 2.

GCF(1280,1298) = 2

We will now calculate the prime factors of 1280 and 1298, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1280 and 1298.

How to find the GCF of 1280 and 1298?

We will first find the prime factorization of 1280 and 1298. After we will calculate the factors of 1280 and 1298 and find the biggest common factor number .

Step-1: Prime Factorization of 1280

Prime factors of 1280 are 2, 5. Prime factorization of 1280 in exponential form is:

1280 = 2⁸ × 5¹

Step-2: Prime Factorization of 1298

Prime factors of 1298 are 2, 11, 59. Prime factorization of 1298 in exponential form is:

1298 = 2¹ × 11¹ × 59¹

Step-3: Factors of 1280

List of positive integer factors of 1280 that divides 1280 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640

Step-4: Factors of 1298

List of positive integer factors of 1298 that divides 1280 without a remainder.

1, 2, 11, 22, 59, 118, 649

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1280 and 1298. The biggest common factor number is the GCF number.
So the greatest common factor 1280 and 1298 is 2.

Also check out the Least Common Multiple of 1280 and 1298