GCF for 15 and 68

What is the Greatest Common Factor of 15 and 68?

Answer: GCF of 15 and 68 is 1

(One)

Finding GCF for 15 and 68 using all factors (divisors) listing

The first method to find GCF for numbers 15 and 68 is to list all factors for both numbers and pick the highest common one:

All factors of 15: 1, 3, 5, 15

All factors of 68: 1, 2, 4, 17, 34, 68

So the Greatest Common Factor for 15 and 68 is 1

Finding GCF for 15 and 68 by Prime Factorization

GCF Table

Number 1Number 2GCF
1681
2682
3681
4684
5681
6682
7681
8684
9681
10682
11681
12684
13681
14682
15681
16684
176817
18682
19681
20684
21681
22682
23681
24684
25681
26682
27681
28684
29681
30682

About "Greatest Common Factor" Calculator

This calculator will help you find the greatest common factor (GCF) of two numbers. For example, it can help you find out what is the Greatest Common Factor of 15 and 68? (The answer is: 1). Select the first number (e.g. '15') and the second number (e.g. '68'). After that hit the 'Calculate' button.
Greatest Common Factor (GCF) also known as the Greatest Common Divisor (GCD) or Highest Common Factor (HCF) - it is the largest positive integer that divides each of the integers with zero remainder

FAQ

What is the Greatest Common Factor of 15 and 68?

GCF of 15 and 68 is 1