What is the Greatest Common Factor of 603 and 618?

Greatest common factor (GCF) of 603 and 618 is 3.

GCF(603,618) = 3

We will now calculate the prime factors of 603 and 618, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 603 and 618.

How to find the GCF of 603 and 618?

We will first find the prime factorization of 603 and 618. After we will calculate the factors of 603 and 618 and find the biggest common factor number .

Step-1: Prime Factorization of 603

Prime factors of 603 are 3, 67. Prime factorization of 603 in exponential form is:

603 = 3² × 67¹

Step-2: Prime Factorization of 618

Prime factors of 618 are 2, 3, 103. Prime factorization of 618 in exponential form is:

618 = 2¹ × 3¹ × 103¹

Step-3: Factors of 603

List of positive integer factors of 603 that divides 603 without a remainder.

1, 3, 9, 67, 201

Step-4: Factors of 618

List of positive integer factors of 618 that divides 603 without a remainder.

1, 2, 3, 6, 103, 206, 309

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 603 and 618. The biggest common factor number is the GCF number.
So the greatest common factor 603 and 618 is 3.

Also check out the Least Common Multiple of 603 and 618