FREE · CALCULATORS & CONVERTERS
Prime Checker and Factorization.
Check primality and report exact prime factors within a bounded integer range.
How to use Prime Checker and Factorization
Choose the operation, enter the required values and generate the result. Review units, calendar rules and assumptions before using it.
How it works
Check primality and report exact prime factors within a bounded integer range. Integers 1–1,000,000,000,000. Trial division is bounded; larger integers are unsupported.
Example
360 → 2³ × 3² × 5
Questions about Prime Checker and Factorization
Is Prime Checker and Factorization free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
Integers 1–1,000,000,000,000. Trial division is bounded; larger integers are unsupported. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.