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A prime number is a number that can only be divided by itself and one (1).

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As in prime number? It's a number that's only divisible by the number 1 or itself. For instance 3 is a prime number because it can only be divided by 3 (once), and 1 (three t…imes). 6 on the other hand is not a prime number because not only can it be divided by 6 (once), and 1 (six times), it can also be divided by 3 (twice) and 2 (three times) (MORE)

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I prime number is a whole number divisible only by 1 and itself. Some examples are 2, 3, 5, 7, 11, 13, 17, 19...

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If your talking about prime numbers, prime numbers are numbers that are only divisible by one and themselves. Composite numbers are numbers divisible by more than one and itse…lf. Like 3 is prime because it is only divisible by 1 and itself. 6 is composite because it is divisible by 1,2,3, and itself. (MORE)

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A prime number is a number that cannot be generated by multiplying any 2 whole numbers (aside from 1 and itself). For example, 8 is not a prime number because you can get it b…y multiplying 4X2. 7 on the other hand IS a prime number because there are no whole numbers you can multiply to generate it aside from 1X7. (MORE)

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All numbers that only have one and itself as factors are prime. Therefore, to tell if a number is prime simply find it's factors. If it has more than two factors than it is no…t a prime number. (MORE)

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A prime number is prime because It can only be multiplied by 1 and itself which makes it prime. A number is composite because it can be multiplied by more than two factors. …factors: Two numbers you multiply together to come up with a number/answer. (MORE)

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sometimes two primes equal a prime and sometimes they don't. for example 2 and 5 are prime and they equal 7 which is also prime. however if you add 5 and 11 which are prime it… equals 16 which isn't prime- it's composite:) (MORE)

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Did you mean what Mersenne numbers are prime? If a number is a prime, how is it not a prime at the same time? Anyways, M11, or (2^11) - 1, I think is the lowest Mersenne Numbe…r Mp that isn't prime, when p is prime. Any Mersenne Number where p is not prime cannot be prime. (MORE)

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A prime number is defined as any number greater than 1 which is only divisible by 1 or itself. Examples: 2, 3, 5, 7, 11, 13 ...