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Calculate the Greatest Common Factor or GCF of 654

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The instructions to find the GCF of 654 are the next:

1. Decompose all numbers into prime factors

6542
3273
109109
1

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

Prime factors of 654=2 . 3 . 109

3. Choose the common prime factors with the lowest exponent

Common prime factors: 2 , 3 , 109

Common prime factors with the lowest exponent: 21, 31, 1091

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. 1091 = 654


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