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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In mathematics, a prime number (or a prime) is a natural number which has exactly two distinct natural number divisors: 1 and itself1) first2) get ready3) best
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It is a number grid that only contains prime numbers.
It is a prime number
Humans sometimes use prime numbers when doing mathematics.