Last updated: March 16, 2026

This Privacy Policy explains how PrimeCalc ("we," "us," or "our") collects, uses, and protects information when you visit prime.trysitely.com. We are committed to protecting your privacy and being transparent about our data practices.

Your Data Stays in Your Browser

PrimeCalc does not collect, store, or transmit any of the numbers or values you enter into our calculators. All computations — primality tests, factorizations, GCD/LCM calculations — are performed entirely within your browser using JavaScript. No input data is ever sent to our servers or any third party.

Information We Collect

PrimeCalc uses Google Analytics 4 (GA4) to collect anonymous usage data. This includes:

Pages visited and time spent on each page
General geographic location (country/region level only)
Device type, browser, and operating system
Referring websites and search terms
Custom events such as which calculator was used (tool name only, never input values)

We do not collect personally identifiable information (PII) such as your name, email address, or IP address through analytics.

How We Use This Information

Analytics data is used solely to understand which calculators are most useful, identify technical issues, and improve the site. We do not sell, rent, or share analytics data with third parties beyond what is required to operate Google Analytics.

Cookies

Google Analytics sets first-party cookies (_ga, _gid, _ga_*) to distinguish users and sessions. These cookies do not contain personally identifiable information. Cookie data is retained for 26 months by default.

You can opt out of Google Analytics tracking via:

Your browser's cookie settings (delete or block cookies from google-analytics.com)
The Google Analytics opt-out browser add-on
Browser privacy modes (Incognito/Private) prevent persistent tracking

Advertising

We display advertisements through Google AdSense to support the free operation of this site. Google AdSense uses cookies and similar technologies to serve ads based on your interests and prior visits to this and other websites. You can review Google's advertising privacy controls at adssettings.google.com and opt out of interest-based advertising.

Third-Party Links

PrimeCalc may contain links to external websites. We are not responsible for the privacy practices of those sites and encourage you to review their privacy policies before providing any personal information.

Children's Privacy

PrimeCalc does not knowingly collect data from children under 13. The site is intended for students, educators, developers, and general users. We do not offer accounts, registration, or any feature requiring personal data submission.

Changes to This Policy

We may update this Privacy Policy periodically. The "Last updated" date at the top of this page will reflect any changes. Continued use of the site after a policy update constitutes acceptance of the revised terms.

Contact

For privacy questions or requests, use our contact page. We will respond within 5 business days.