What is prime factorization?

Prime factorization expresses a number as a product of prime numbers. For example, 360 = 2^3 × 3^2 × 5, meaning 2 × 2 × 2 × 3 × 3 × 5.

What happens if I enter a prime number?

The tool tells you the number is prime, since a prime number has no factors other than 1 and itself.

Is any data uploaded?

No — the factorization is computed entirely in your browser. Nothing is sent anywhere.

Prime Factorization Calculator

Break any whole number down into its prime factors instantly.

Prime factorization calculator

Enter any whole number and instantly see its prime factorization — the unique product of prime numbers that make it up, shown in exponent form like 360 = 2^3 × 3^2 × 5.

Everything runs locally in your browser, so your numbers never leave your device. Prime numbers are flagged automatically.