Prime or Composite Number Calculator

Prime or Composite Number Calculator

Prime or Composite Number Calculator is an online tool that helps to determine whether a given number is a prime number or a composite number.

What are prime & composite numbers?

Prime numbers and composite numbers are classifications used to categorize integers in number theory. Here are the differences between prime and composite numbers:

Prime Numbers:

A prime number is a non-negative integer greater than 1 that has no positive divisors except 1 and itself. Prime numbers have only two distinct factors: 1 and the number itself.

Some examples of prime numbers include 2, 3, 5, 7, 11, 13, 17, and so on.

Composite Numbers:

A composite number is a non-negative integer greater than 1 that has one more positive divisor other than 1 and itself.  Composite numbers have more than two distinct factors. They have at least three factors: 1, the number itself, and at least one other factor.

Some examples of composite numbers include 4, 6, 8, 9, 10, 12, 14, and so on.

Examples

Example 1: 

Evaluate whether the number 19 is a prime or composite number.

Solution

The given number is a prime number because it has only two divisors that is 1 and itself.

1, 19

Example 2:

Evaluate whether the number 125 is a prime or composite number.

Solution

The number is composite because it has more than two divisors. 

1, 5, 25, 125