What is the Greatest Common Factor of 715 and 721?

Greatest common factor (GCF) of 715 and 721 is 1.

GCF(715,721) = 1

We will now calculate the prime factors of 715 and 721, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 715 and 721.

How to find the GCF of 715 and 721?

We will first find the prime factorization of 715 and 721. After we will calculate the factors of 715 and 721 and find the biggest common factor number .

Step-1: Prime Factorization of 715

Prime factors of 715 are 5, 11, 13. Prime factorization of 715 in exponential form is:

715 = 5¹ × 11¹ × 13¹

Step-2: Prime Factorization of 721

Prime factors of 721 are 7, 103. Prime factorization of 721 in exponential form is:

721 = 7¹ × 103¹

Step-3: Factors of 715

List of positive integer factors of 715 that divides 715 without a remainder.

1, 5, 11, 13, 55, 65, 143

Step-4: Factors of 721

List of positive integer factors of 721 that divides 715 without a remainder.

1, 7, 103

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 715 and 721. The biggest common factor number is the GCF number.
So the greatest common factor 715 and 721 is 1.

Also check out the Least Common Multiple of 715 and 721