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When used as in "Prime number" or "prime factor", it means that the number has exactly 2 factors. For example: 17 has only the factors 1 and 17, so it is prime. 14 has the factors 1, 2, 7, and 14, so it is not prime.

When used as in "relatively prime", it means that two or more numbers do not have any common factors other than 1. For example: 3 and 4 do not have any common factors other than 1, so they are relatively prime. 6 and 10 have 1 and 2 as common factors, so they are not relatively prime.

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15y ago

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