What is the Greatest Common Factor (GCF) of 5 and 721?
Are you on the hunt for the GCF of 5 and 721? Since you're on this page I'd guess so! In this quick guide, we'll walk you through how to calculate the greatest common factor for any numbers you need to check. Let's jump in!
First off, if you're in a rush, here's the answer to the question "what is the GCF of 5 and 721?":
GCF of 5 and 721 = 1
What is the Greatest Common Factor?
- Greatest Common Denominator (GCD)
- Highest Common Factor (HCF)
- Greatest Common Divisor (GCD)
For most school problems or uses, you can look at the factors of the numbers and find the greatest common factor that way. For 5 and 721 those factors look like this:
- Factors for 5: 1 and 5
- Factors for 721: 1, 7, 103, and 721
As you can see when you list out the factors of each number, 1 is the greatest number that 5 and 721 divides into.
List out all of the prime factors for each number:
- Prime Factors for 5: 5
- Prime Factors for 721: 7 and 103
Now that we have the list of prime factors, we need to find any which are common for each number.
GCF = 1
Find the GCF Using Euclid's Algorithm
The final method for calculating the GCF of 5 and 721 is to use Euclid's algorithm. This is a more complicated way of calculating the greatest common factor and is really only used by GCD calculators.