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A single number cannot have a greatest common factor because "common" refers to factors that two or more numbers have in common. You have only one number.

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15y ago

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The prime factorization of 30 is 2 x 3 x 5. It is not possible to find the GCF of a single number.

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9y ago
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Q: Find the greatest common factor of 30 using prime factorization?
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