Calculate the Greatest Common Factor or GCF of 276 and 1238
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The instructions to find the GCF of 276 and 1238 are the next:
1. Decompose all numbers into prime factors
276 | 2 |
138 | 2 |
69 | 3 |
23 | 23 |
1 |
1238 | 2 |
619 | 619 |
1 |
2. Write all numbers as the product of its prime factors
Prime factors of 276 | = | 22 . 3 . 23 |
Prime factors of 1238 | = | 2 . 619 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 2
Common prime factors with the lowest exponent: 21
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 = 2
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