An online calculator to factor positive integers into prime factors.

Unique Prime Factorisation Theorem

Any integer grater than on is either a prime number or it can be represented as a product of prime numbers in a unique way.
Example
6 = 2 × 3 , 2 and 3 are primes
100 = 2 × 2 × 5 × 5 , 2 and 5 are primes
1500 = 2 × 2 × 3 × 5 × 5 × 5

Use the calculator to Factor into Primes

1 - Enter a positive integer n and press "Factor".

More References and Links