What is the Greatest Common Factor (GCF) of 76 and 85?
Are you on the hunt for the GCF of 76 and 85? 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 76 and 85?":
GCF of 76 and 85 = 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 76 and 85 those factors look like this:
- Factors for 76: 1, 2, 4, 19, 38, and 76
- Factors for 85: 1, 5, 17, and 85
As you can see when you list out the factors of each number, 1 is the greatest number that 76 and 85 divides into.
List out all of the prime factors for each number:
- Prime Factors for 76: 2, 2, and 19
- Prime Factors for 85: 5 and 17
Now that we have the list of prime factors, we need to find any which are common for each number.
Since there are no common prime factors between the numbers above, this means the greatest common factor is 1:
GCF = 1
Find the GCF Using Euclid's Algorithm
The final method for calculating the GCF of 76 and 85 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.