What is the Greatest Common Factor of 2555 and 2561?

Greatest common factor (GCF) of 2555 and 2561 is 1.

GCF(2555,2561) = 1

We will now calculate the prime factors of 2555 and 2561, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 2555 and 2561.

How to find the GCF of 2555 and 2561?

We will first find the prime factorization of 2555 and 2561. After we will calculate the factors of 2555 and 2561 and find the biggest common factor number .

Step-1: Prime Factorization of 2555

Prime factors of 2555 are 5, 7, 73. Prime factorization of 2555 in exponential form is:

2555 = 5¹ × 7¹ × 73¹

Step-2: Prime Factorization of 2561

Prime factors of 2561 are 13, 197. Prime factorization of 2561 in exponential form is:

2561 = 13¹ × 197¹

Step-3: Factors of 2555

List of positive integer factors of 2555 that divides 2555 without a remainder.

1, 5, 7, 35, 73, 365, 511

Step-4: Factors of 2561

List of positive integer factors of 2561 that divides 2555 without a remainder.

1, 13, 197

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 2555 and 2561. The biggest common factor number is the GCF number.
So the greatest common factor 2555 and 2561 is 1.

Also check out the Least Common Multiple of 2555 and 2561