Solutions by » Answers » GCF of two numbers

What is the GCF of 2 and 7?

The gcf of 2 and 7 is 1.

Steps to find GCF

  1. Find the prime factorization of 2
    2 = 2
  2. Find the prime factorization of 7
    7 = 7
  3. To find the gcf, multiply all the prime factors common to both numbers:

    Therefore, GCF = 1

The greatest common factor (gcf) is also known as greatest common divisor (gcd) or highest common factor (hcf).


Find hcf of:

GCF Calculator

Enter two numbers separate by comma. To find gcf of more than two numbers, click here.