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Editors' Review · October 30, 2025

Prime95: A Comprehensive CPU Stress Testing Tool

Prime95 is a powerful application designed for testing CPU stability, particularly beneficial for users who have overclocked their processors. This utility performs rigorous stress tests by executing complex mathematical calculations related to prime numbers. When connected to PrimeNet, it not only tests your CPU's capabilities but also contributes to mathematical research by processing and returning data. The software operates effectively in a standalone mode, though its full potential is unlocked when connected to the PrimeNet network.

The interface of Prime95 is straightforward, making it accessible for both novice and experienced users. It provides detailed results on CPU performance, including temperature monitoring and error reporting, which are critical for ensuring system reliability during overclocking. While the application is free to use, it does require a connection to PrimeNet for optimal functionality, particularly for reporting results and accessing the best workloads. Overall, Prime95 serves as an essential tool for enthusiasts looking to push their hardware to the limit.

Enlarged image for Prime95
Prime95 0/5

Technical

Title
Prime95 30.8b15 for Windows
Requirements
  • Windows 95
  • Windows 2003
  • Windows Vista
  • Windows 98
  • Windows 7
  • Windows 98 SE
  • Windows NT
  • Windows XP
  • Windows 2000
  • Windows ME
  • Windows 8
Language
English
Available languages
English
License
Free
Latest update
Author
george-woltman
SHA-1
daa707626a7cd0ae3b0116dd6b298c6ecebba95c
Filename
p95v308b15.win32.zip

Program available in other languages



Changelog

We don’t have any change log information yet for version 30.8b15 of Prime95. Sometimes publishers take a little while to make this information available, so please check back in a few days to see if it has been updated.

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