Is this prime factorization tool free?

Yes, completely free with no signup and no usage limits.

Does my data leave my device?

No. Factorization runs entirely in your browser. Nothing is sent to any server.

Does it work on mobile?

Yes. Works on iPhone Safari and Android Chrome without installing any app.

What is the largest number I can factorize?

Up to 1,000,000,000,000 (one trillion). Beyond that, the trial-division algorithm may be slow, so the input is capped at 10¹².

Prime Factorization

Find the prime factorization of any positive integer up to 1 trillion. Shows exponential form, flat factor list, and total divisor count. Free, no upload.

100% client-side · no upload

Integer to factorize

How to use

Type any positive integer (≥ 2) into the input field.
The prime factorization updates automatically as you type.
The result shows exponential form (e.g. 360 = 2³ × 3² × 5), the flat factor list, and the total number of divisors.

Related tools

More ways to use this tool

Frequently Asked Questions

Is this prime factorization tool free?: Yes, completely free with no signup and no usage limits.
Does my data leave my device?: No. Factorization runs entirely in your browser. Nothing is sent to any server.
Does it work on mobile?: Yes. Works on iPhone Safari and Android Chrome without installing any app.
What is the largest number I can factorize?: Up to 1,000,000,000,000 (one trillion). Beyond that, the trial-division algorithm may be slow, so the input is capped at 10¹².

Last updated: 2026-05-20 By jarvisbox