Calculate the Greatest Common Factor or GCF of 858
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The instructions to find the GCF of 858 are the next:
1. Decompose all numbers into prime factors
858 | 2 |
429 | 3 |
143 | 11 |
13 | 13 |
1 |
2. Write all numbers as the product of its prime factors
Prime factors of 858 | = | 2 . 3 . 11 . 13 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 2 , 3 , 11 , 13
Common prime factors with the lowest exponent: 21, 31, 111, 131
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. 31. 111. 131 = 858
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