Solutions by » GCF of two numbers

What is the GCF of 1017 and 253?

The gcf of 1017 and 253 is 1.

Steps to find GCF

  1. Find the prime factorization of 1017
    1017 = 3 × 3 × 113
  2. Find the prime factorization of 253
    253 = 11 × 23
  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).