What is the Greatest Common Factor of 1281 and 1288?

Greatest common factor (GCF) of 1281 and 1288 is 7.

GCF(1281,1288) = 7

We will now calculate the prime factors of 1281 and 1288, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1281 and 1288.

How to find the GCF of 1281 and 1288?

We will first find the prime factorization of 1281 and 1288. After we will calculate the factors of 1281 and 1288 and find the biggest common factor number .

Step-1: Prime Factorization of 1281

Prime factors of 1281 are 3, 7, 61. Prime factorization of 1281 in exponential form is:

1281 = 3¹ × 7¹ × 61¹

Step-2: Prime Factorization of 1288

Prime factors of 1288 are 2, 7, 23. Prime factorization of 1288 in exponential form is:

1288 = 2³ × 7¹ × 23¹

Step-3: Factors of 1281

List of positive integer factors of 1281 that divides 1281 without a remainder.

1, 3, 7, 21, 61, 183, 427

Step-4: Factors of 1288

List of positive integer factors of 1288 that divides 1281 without a remainder.

1, 2, 4, 7, 8, 14, 23, 28, 46, 56, 92, 161, 184, 322, 644

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1281 and 1288. The biggest common factor number is the GCF number.
So the greatest common factor 1281 and 1288 is 7.

Also check out the Least Common Multiple of 1281 and 1288