Fifteen is not a prime number. A prime number is a positive number that has only two possible divisors, 1 and itself. Fifteen can be divided by 3 and 5 as well as 1 and itself. More »

The prime factors of 50 are 2 and 5, with the rest of its factors not being prime numbers. A factor is any number that can be divided evenly into the base number of interest, but only some factors are also prime numbers. More »

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A number that is not prime is called a composite number. Composite numbers can be divided up into smaller whole numbers called factors. A prime number has no factors other than one and itself. More »

The prime factors of the number 64 are 2 x 2 x 2 x 2 x 2 x 2 or 2 to the 6th power. The number 2 is a prime number and when you multiply six 2’s the product is the given number, which is 64. More »

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The number 93 is not a prime number; i'is a composite number. A prime number is any positive number that can only be divided evenly by the number 1 and itself; 93 can be evenly divided by 3 and 31. More »

Sixty-one is a prime number. It is the 18th prime number in the series. It is also a centered square number, a centered hexagonal number and a centered decagonal number and the sum of two square numbers. More »

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One is not a prime number because the definition of a prime number is any number that is greater than one that is only divisible by one and itself. Since one is of course not greater than one, it does not fit the definit... More »