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To find the factors of a number, you need to try dividing it by each Prime number in turn. You can stop at what would be the numbers square root. In this case the number is less than 81 so we can stop at 9. Try dividing 79 by 2, 3, 5 and 7 and you will find that none of them divide evenly. Thus, 79 is prime, and the only factors it will have are 1 and 79.

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13y ago

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