Practice Test
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Find the product of the common prime factors.
13
The greatest common factor (GCF) is the greatest number that is a factor of two or more numbers. The first step for finding a GCF is to break down each number into its prime factors. We will write down all of the prime factors that are common between the given numbers.
| Given number | Prime Factorization | Common Prime Factors |
|---|---|---|
| 52 | 2* 2* 13 | 13 |
| 65 | 5* 13 | 13 |
For the given values, the only common prime factor is 13. Therefore, the GCF is 13.