# Question #490ed

##### 1 Answer

Prime numbers have exactly

#### Explanation:

Count the number of factors that a number has.

A PRIME number has exactly TWO factors - 1 and itself.

The first prime numbers are:

1 is not a prime number becasue it only has ONE factor -

Numbers which have THREE or more factors are COMPOSITE.

Here is a list of the factors of the numbers up to 12.

The prime numbers are shown in red:

They all have exactly