Practice Test
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Find the product of the common prime factors.
8
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 |
|---|---|---|
| 16 | 2* 2* 2* 2 | 2, 2, 2 |
| 32 | 2* 2* 2* 2* 2 | 2, 2, 2 |
| 72 | 2* 2* 2* 3* 3 | 2, 2, 2 |
For the given values, the common prime factors are 2, 2, and 2. The next step is to calculate the product of these factors. 2* 2* 2 = 8