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Calculate the Greatest Common Factor or GCF of 515

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The instructions to find the GCF of 515 are the next:

1. Decompose all numbers into prime factors

5155
103103
1

2. Write all numbers as the product of its prime factors

Prime factors of 515=5 . 103

3. Choose the common prime factors with the lowest exponent

Common prime factors: 5 , 103

Common prime factors with the lowest exponent: 51, 1031

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 = 51. 1031 = 515


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