Calculate the Greatest Common Factor or GCF of 2156
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The instructions to find the GCF of 2156 are the next:
1. Decompose all numbers into prime factors
2156 | 2 |
1078 | 2 |
539 | 7 |
77 | 7 |
11 | 11 |
1 |
2. Write all numbers as the product of its prime factors
Prime factors of 2156 | = | 22 . 72 . 11 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 2 , 7 , 11
Common prime factors with the lowest exponent: 22, 72, 111
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 = 22. 72. 111 = 2156
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