Prime Factorization Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter a whole number of 2 or more.
- Read its prime factors and the exponent form.
How it works
The number is divided by the smallest possible primes repeatedly until only 1 remains — those divisors are the prime factorization.
Worked example
360. = 2 × 2 × 2 × 3 × 3 × 5 = 2³ × 3² × 5.
Common mistakes
- Stopping at any factors — keep going until every factor is prime (e.g. 4 = 2 × 2).
- Forgetting 1 isn't prime and isn't listed as a factor.
Frequently asked questions
What's exponent form?
Repeated primes written as powers — 360 = 2³ × 3² × 5 instead of 2 × 2 × 2 × 3 × 3 × 5.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.