Solutions by » GCF of two numbers

What is the GCF of 660 and 163?

The GCF of 660 and 163 is 1.

Steps to find GCF

  1. Find the prime factorization of 660
    660 = 2 × 2 × 3 × 5 × 11
  2. Find the prime factorization of 163
    163 = 163
  3. To find the GCF, multiply all the prime factors common to both numbers:

    Therefore, GCF = 1

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The greatest common factor (GCF) is also known as greatest common divisor (GCD) or highest common factor (HCF).