Q:
# Why Is One Not a Prime Number?

**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 definition of a prime number.

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A number can either be a prime or a composite number. A composite number has more factors than one and itself. An example of a composite number is 12, which has the factors one, two, three, four, six and 12. An example of a prime number is 11, which has no other factors than one and 11.

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Q:
## What Are the Prime Factors of 12?

A: The prime factors of 12 are 2 and 3. A prime number is a number greater than 1 that cannot be divided by any number except itself and 1. Both 2 and 3 are p... Full Answer >Filed Under: -
Q:
## What Is the Prime Factorization of 72?

A: The prime factorization of 72 is 23x 32, or 2 x 2 x 2 x 3 x 3. The prime factorization of a number involves determining the factors of a number that are al... Full Answer >Filed Under: -
Q:
## Is Five a Prime Number?

A: Five is a prime number. A prime number is a number which only has two factors. Those two factors are one and the number itself. Full Answer >Filed Under: -
Q:
## Is Three a Prime Number?

A: The number 3 is a prime number. A prime number is a positive number that can only be divided evenly by the number 1 and itself. Full Answer >Filed Under: