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GCF of a Prime number and a composite number is 1 if the composite number is not a multiple of the prime number.

It is clear here that 39 is not a multiple of 47, therefore GCF(47, 39) = 1.

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13y ago

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The GCF is 1.

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9y ago
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Q: What is the greatest common factor of 47 and 39?
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