Calculate the Greatest Common Factor or GCF of 1521
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The instructions to find the GCF of 1521 are the next:
1. Decompose all numbers into prime factors
1521 | 3 |
507 | 3 |
169 | 13 |
13 | 13 |
1 |
2. Write all numbers as the product of its prime factors
Prime factors of 1521 | = | 32 . 132 |
3. Choose the common prime factors with the lowest exponent
Common prime factors: 3 , 13
Common prime factors with the lowest exponent: 32, 132
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 = 32. 132 = 1521
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