GCF for 3 and 7

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

What is the Greatest Common Divisor of 3 and 7?

Answer

GCF of 3 and 7 is 1

(One)

Finding GCF for 3 and 7 using all factors (divisors) listing

The first method to find GCF for numbers 3 and 7 is to list all factors for both numbers and pick the highest common one:

All factors of 3: 1, 3

All factors of 7: 1, 7

So the Greatest Common Factor for 3 and 7 is 1

Finding GCF for 3 and 7 by Prime Factorization

The numbers 3 and 7 have no common prime factors, which means they are coprime (relatively prime). Therefore, GCF = 1.

Related Calculations

See Also

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 Divisor of 3 and 7? (The answer is: 1). Select the first number (e.g. '3') and the second number (e.g. '7'). 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.

"Greatest Common Factor" Calculator

Greatest Common Factor of

and

GCF Table

Number 1 Number 2 GCF
1 7 1
2 7 1
3 7 1
4 7 1
5 7 1
6 7 1
7 7 7
8 7 1
9 7 1
10 7 1
11 7 1
12 7 1
13 7 1
14 7 7
15 7 1
16 7 1
17 7 1
18 7 1
19 7 1
20 7 1
21 7 7
22 7 1
23 7 1
24 7 1
25 7 1
26 7 1
27 7 1
28 7 7
29 7 1
30 7 1

FAQ

What is the Greatest Common Divisor of 3 and 7?
GCF of 3 and 7 is 1

How to find the GCF of 3 and 7?
You can find the GCF of 3 and 7 by listing all factors of both numbers and picking the greatest common one, or by prime factorization. The GCF of 3 and 7 is 1.

Are 3 and 7 coprime?
Yes, 3 and 7 are coprime (relatively prime) because their Greatest Common Factor is 1.

See Also