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A Prime number is a number that only has two factors. That is, it can only divide evenly (without leaving a remainder) by 1 and itself. 21 can divide by 3 to give 7. Therefore it has more factors than just 1 and itself. Thus twenty-one is not a member of the prime number set.

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Is seventeen a member of the prime number set?

A prime number is a number that only has two factors. That is, it can only divide evenly by 1 and itself. 17 cannot divide by any number in between 1 and itself. Thus it has only two factors. Therefore 17 is a member of the prime number set.


Is a prime factor the same as a proper factor?

No, a prime factor is a single factor that is a prime number. A proper factor is a member of the set of factors that doesn't include one and the number itself.


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It is the set {2}.


Set all Prime numbers divisible by 3?

Prime numbers are only divisible by 1 and themselves. Since 3 is not a prime number, any prime number divisible by 3 does not exist. Therefore, the set of prime numbers divisible by 3 is an empty set.


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What is a number that is relatively prime?

A number is relatively prime to another number or set of numbers when their GCF is 1.


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