Great Internet Mersenne Prime Search and GIMPS for Windows PC

Prime95

Prime95 30.19 Build 13

  -  8.4 MB  -  Freeware

Sometimes latest versions of the software can cause issues when installed on older devices or devices running an older version of the operating system.

Software makers usually fix these issues but it can take them some time. What you can do in the meantime is to download and install an older version of Prime95 30.19 Build 13.


For those interested in downloading the most recent release of Prime95 or reading our review, simply click here.


All old versions distributed on our website are completely virus-free and available for download at no cost.


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If you have any questions or ideas that you want to share with us - head over to our Contact page and let us know. We value your feedback!

  • Prime95 30.19 Build 13 Screenshots

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    Prime95 30.19 Build 13 Screenshot 1
  • Prime95 30.19 Build 13 Screenshot 2
  • Prime95 30.19 Build 13 Screenshot 3
  • Prime95 30.19 Build 13 Screenshot 4

What's new in this version:

- Huge improvements to stage 2 of ECM when lots of memory is available
- Warning: prime.txt and local.txt files are automatically combined into one file. Consider backing up these files before installing.
- Warning: upgrading in the middle of P-1 or ECM stage 2 may restart stage 2 from scratch