Calculate the Greatest Common Factor or GCF of 658
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The instructions to find the GCF of 658 are the next:
1. Decompose all numbers into prime factors
| 658 | 2 |
| 329 | 7 |
| 47 | 47 |
| 1 |
2. Write all numbers as the product of its prime factors
| Prime factors of 658 | = | 2 . 7 . 47 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 2 , 7 , 47
Common prime factors with the lowest exponent: 21, 71, 471
4. Calculate the Greatest Common Factor or GCF
Remember, to find the GCF of several numbers you must multiply the common prime factors with the lowest exponent.
GCF = 21. 71. 471 = 658
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