Solutions by » GCF of two numbers

What is the GCF of 503 and 425?

The GCF of 503 and 425 is 1.

Steps to find GCF

  1. Find the prime factorization of 503
    503 = 503
  2. Find the prime factorization of 425
    425 = 5 × 5 × 17
  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).