Quick answer
Prime number check.
This is a simple Android app that lets you check if a number is prime. If it isn't, it will display the prime factors of the number.
Screenshots
How to install
- Download the APK from the button at the top of this page.
- Allow “Install unknown apps” for your browser or file manager only, not for every app.
- Open the downloaded file and confirm the installation.
- If installation fails with “App not installed,” remove an earlier build of the same app first. A signature conflict is the usual cause.
Data safety
- Every file is checked against its published SHA-256 before it is listed.
- Files are scanned for malware on every update.
- The permissions each app requests are listed on its own page.
- Read the full safety policy for how we test, flag, and delist files.
Frequently asked questions
What is Is it Prime?
Prime number check.
Who develops Is it Prime?
Is it Prime is developed by Bodo Bauer.
Which Android version does Is it Prime require?
Is it Prime requires Android API 34 or later.
What is the current version of Is it Prime?
The synchronized F-Droid version is 1.10.
Which license does Is it Prime use?
The signed F-Droid metadata lists GPL-3.0-or-later.
Where is the source code for Is it Prime?
https://gitlab.com/bodoba/is-it-prime
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