What is the Greatest Common Factor of 545 and 556?

Greatest common factor (GCF) of 545 and 556 is 1.

GCF(545,556) = 1

We will now calculate the prime factors of 545 and 556, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 545 and 556.

How to find the GCF of 545 and 556?

We will first find the prime factorization of 545 and 556. After we will calculate the factors of 545 and 556 and find the biggest common factor number .

Step-1: Prime Factorization of 545

Prime factors of 545 are 5, 109. Prime factorization of 545 in exponential form is:

545 = 5¹ × 109¹

Step-2: Prime Factorization of 556

Prime factors of 556 are 2, 139. Prime factorization of 556 in exponential form is:

556 = 2² × 139¹

Step-3: Factors of 545

List of positive integer factors of 545 that divides 545 without a remainder.

1, 5, 109

Step-4: Factors of 556

List of positive integer factors of 556 that divides 545 without a remainder.

1, 2, 4, 139, 278

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 545 and 556. The biggest common factor number is the GCF number.
So the greatest common factor 545 and 556 is 1.

Also check out the Least Common Multiple of 545 and 556