Prime95

by Mersenne Research, Inc.v30.19b20

mersenne.prime95

Last updated Apr 28, 2026

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.

Install with winget

$ winget install --id mersenne.prime95 --exact --version 30.19b20

Run in Command Prompt, PowerShell, or Windows Terminal. Prompts for any agreements.

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Installers · v30.19b20

Architecture	Type	Scope	Install	Download
x86	zip	-		Direct
x64	zip	-		Direct

Copy a command tailored to that specific architecture, type, and scope - useful when winget would otherwise pick a different default.

Frequently asked questions

How do I install Prime95 on Windows?

Open Windows Terminal, PowerShell, or Command Prompt and run: winget install --id mersenne.prime95 --exact --version 30.19b20. winget downloads the installer from Mersenne Research, Inc. and runs it. Requires Windows 10 (1809+) or Windows 11.

How do I install Prime95 silently for unattended deployment?

Add --silent and accept the agreements upfront: winget install --id mersenne.prime95 --exact 30.19b20 --silent --accept-package-agreements --accept-source-agreements. This is the variant Intune, Configuration Manager, and other deployment tools should use.

How do I uninstall Prime95 via winget?

Run: winget uninstall --id mersenne.prime95 --exact. Add --silent for unattended uninstalls. winget will use the registered uninstaller from Prime95's Apps & Features entry.

Is Prime95 free?

Prime95 is distributed under GIMPS free software license. Refer to the publisher for the full license terms - Wingetly itself does not charge for installation.

Does Prime95 work on Windows 10?

Yes, as long as your Windows 10 build supports winget (1809 or newer). winget ships with App Installer on Windows 10/11 and pulls Prime95 directly from the publisher.

How do I keep Prime95 up to date?

Run winget upgrade --id mersenne.prime95 --exact, or winget upgrade --all to update everything winget tracks. We index 1 version of Prime95 from microsoft/winget-pkgs.