What is the Greatest Common Factor of 2955 and 2970?

Greatest common factor (GCF) of 2955 and 2970 is 15.

GCF(2955,2970) = 15

We will now calculate the prime factors of 2955 and 2970, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 2955 and 2970.

How to find the GCF of 2955 and 2970?

We will first find the prime factorization of 2955 and 2970. After we will calculate the factors of 2955 and 2970 and find the biggest common factor number .

Step-1: Prime Factorization of 2955

Prime factors of 2955 are 3, 5, 197. Prime factorization of 2955 in exponential form is:

2955 = 3¹ × 5¹ × 197¹

Step-2: Prime Factorization of 2970

Prime factors of 2970 are 2, 3, 5, 11. Prime factorization of 2970 in exponential form is:

2970 = 2¹ × 3³ × 5¹ × 11¹

Step-3: Factors of 2955

List of positive integer factors of 2955 that divides 2955 without a remainder.

1, 3, 5, 15, 197, 591, 985

Step-4: Factors of 2970

List of positive integer factors of 2970 that divides 2955 without a remainder.

1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 27, 30, 33, 45, 54, 55, 66, 90, 99, 110, 135, 165, 198, 270, 297, 330, 495, 594, 990, 1485

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 2955 and 2970. The biggest common factor number is the GCF number.
So the greatest common factor 2955 and 2970 is 15.

Also check out the Least Common Multiple of 2955 and 2970