# Composite Number Calculator, 1 - 1000 Composite Numbers

## What Are Composite Numbers?

A Natural Number is called a **Composite Number**
if it is not a Prime Number.

Composite numbers starts at Number One and continue to forever; here is an example, 1 to 20: 1, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, ... infinity. Notices numbers 2, 3, 5, 7, 11, 13, 17, 19 ... are not shown above because they are Prime Numbers. To see what numbers between 1 and 1000 are composite numbers, use he composite number calculator.

Please read! **To use this calculator is easy. Enter any number 1 to 1000,
and the calculator will determine if it is a composite number. **