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Prime numbers are numbers which have only two factors one at itself. Some prime numbers are 2, 3, 5, 7, 11, 13 ..... The factors of 2 are 1 and 2, factors of 3 are 1 and 3 etc

Just like the others stated, a prime number is a natural number divided evenly by itself and another number, specifically 1 and another natural number. For prime numbers from 1 to 100, they are...2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97.

Hope that helps.Prime numbers are integers that are greater than 1 and are only divisible by themselves and 1.

1 is not prime because it only has 1 whole number factor. Most definitions of prime numbers include only positive numbers, however in the algebra class I teach we write the prime factorization of negative numbers in which -1 is the only negative prime number. For instance, the prime factorization of -10 is -1x2x5.

-1 has only two factors -1 and 1 so it does fit the definition for being prime.

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