# Prime Number Calculator

## What Is A Prime Number?

A Natural Number is called **Prime Number**
if it has exactly two positive divisors, the number one (1) and the number itself.
Prime numbers starts at the number two (2) and continue to infinity.
Example: 2, 3, 5, 7, 11, 13, 17, 19, 23, ... infinity.

Notice numbers 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, ... are not shown because they are Composite Numbers. To see what numbers between 1 and 1000, use he prime number calculator.