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Skip to contentCheck if a number is prime and list its factors.
Check if a number is prime and list its factors.
Quick calculators for everyday numbers — loans, dates, percentages, and more. See results update as you change inputs.
Use this free Prime Number Checker whenever you need a reliable result without creating an account or installing software. It loads in one click and works on desktop and mobile browsers.
Tentaco runs this tool in your browser whenever possible. Text and structured input you paste are handled in the page session unless the tool explicitly fetches remote data. Close the tab or clear the page after use on shared computers. Features that call external APIs (such as URL fetchers) only send the data required for that request.
Check if a number is prime and list its factors. Open the tool in your browser — no account or install required.
Yes — instant results.
No — processing runs locally in your browser. Your files and inputs do not leave your device unless the tool explicitly uses the network.