Calculate the Greatest Common Factor or GCF of 666
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The instructions to find the GCF of 666 are the next:
1. Decompose all numbers into prime factors
| 666 | 2 |
| 333 | 3 |
| 111 | 3 |
| 37 | 37 |
| 1 |
2. Write all numbers as the product of its prime factors
| Prime factors of 666 | = | 2 . 32 . 37 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 2 , 3 , 37
Common prime factors with the lowest exponent: 21, 32, 371
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. 32. 371 = 666
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