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What is the GCF of 13 and 8?

The gcf of 13 and 8 is 1.

Steps to find GCF

  1. Find the prime factorization of 13
    13 = 13
  2. Find the prime factorization of 8
    8 = 2 × 2 × 2
  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).