What is the Greatest Common Factor of 5 and 7?

Greatest common factor (GCF) of 5 and 7 is 1.

GCF(5,7) = 1

We will now calculate the prime factors of 5 and 7, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 5 and 7.

How to find the GCF of 5 and 7?

We will first find the prime factorization of 5 and 7. After we will calculate the factors of 5 and 7 and find the biggest common factor number .

Step-1: Prime Factorization of 5

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

5 = 5¹

Step-2: Prime Factorization of 7

Prime factors of 7 are 7. Prime factorization of 7 in exponential form is:

7 = 7¹

Step-3: Factors of 5

List of positive integer factors of 5 that divides 5 without a remainder.

Step-4: Factors of 7

List of positive integer factors of 7 that divides 5 without a remainder.

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 5 and 7. The biggest common factor number is the GCF number.
So the greatest common factor 5 and 7 is 1.

Also check out the Least Common Multiple of 5 and 7