About Prime95
Prime95 is a stress-testing and benchmarking tool used to find Mersenne prime numbers. It's popular for testing CPU stability under heavy load, especially in overclocking.
Prime95 30.19b20
Prime95 is a stress-testing and benchmarking tool used to find Mersenne prime numbers. It's popular for testing CPU stability under heavy load, especially in overclocking.
- By Mersenne Research, Inc.
- Free
- Portable
Technical details
| Publisher | Mersenne Research, Inc. |
|---|---|
| Version | 30.19b20 |
| License | GIMPS free software license |
| Installer type | zip |
| Architecture | x86, x64 |
| Package ID | mersenne.prime95 |
Install Prime95 from the command line
- Install with Windows Package Manager
winget install --id=mersenne.prime95 -e- Update to the latest version
winget upgrade --id=mersenne.prime95 -e- Uninstall
winget uninstall --id=mersenne.prime95 -e
Frequently asked questions
Is Prime95 free?
Yes, Prime95 is free to download and use on Windows.
What is the latest version of Prime95?
The latest version is 30.19b20.
Is it safe to download Prime95?
The download button links to the official installer published on download.mersenne.ca, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with d9475f2ff3f4a6a701abc49a86a66126cb48abd10bda6fa87039d98fa8756bca.
Which Windows versions does Prime95 support?
Prime95 runs on Windows and is available for 32-bit (x86), 64-bit (x64) systems.
How do I uninstall Prime95?
Open Settings › Apps › Installed apps, find Prime95 and select Uninstall. From the command line, run winget uninstall --id=mersenne.prime95 -e.
Is there a portable version of Prime95?
Yes. Prime95 is available as a portable ZIP archive (p95v3019b20.win64.zip, 64-bit (x64)) that runs without installation. Copy it to any folder or USB drive and run it from there.
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