Privacy Policy

Last updated: November 2026

1. Calculations Stay on Your Device

Prime Number Calculator runs right inside your web browser. Whenever you enter numbers into our tools, all the math happens locally on your own phone or computer. We never send, save, or see the numbers you check.

2. No Accounts Needed

Every tool on this website is completely free and requires no sign-up, password, or email address. You never have to share personal details to use our calculators.

3. Cookies and Site Logs

We do not use tracking cookies to follow you around the web or show personalized ads. Basic, anonymous server logs may be kept briefly to fix technical glitches and keep the website running fast.