primecount is a command-line program that counts the primes below an integer x ≤ 10^31 using highly optimized implementations of the combinatorial prime counting algorithms.
Publisher’s description
What is Primecount?
Primecount by Kim Walisch is open-source Windows software in the terminals & cli tools category. It is written in C++.
Installation and requirements
The publisher provides EXE (Inno Setup) installers for 64-bit and ARM64 Windows. Installation asks for administrator rights. A silent install is possible with the installer’s documented switches.
Updates and version history
The current version is 8.8, released on September 28, 2026. The version history goes back to March 30, 2021: 30 releases, all linked to the official files. That is about 5.5 releases a year. The last update is less than a month old.
Popularity and file types
The source code on GitHub (kimwalisch/primecount) has 365 stars. Similar programs include PowerShell, Oh My Posh and QPDF.
Project description on GitHub: “🚀 Fast prime counting function library”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Native ARM64 build for Windows on Arm
- Documented silent install
- Updated in the last two months
Cons
- Installation needs administrator rights
In short: Primecount is an open-source terminals & cli tool tool for 64-bit and ARM64 PCs. It is actively maintained. Administrators can deploy it unattended.
Is Primecount safe to download?
- The file is served by github.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
316EAB38A0813B4BA98DBD117B7D736651C61A48D30EA2551DDE2FE2DF5EC76D· Open the VirusTotal report for this hash - The link has not been checked yet
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 30 versions ›30 versions over 5 years · about 5.5 a year
| Version | Date | Size | Files |
|---|---|---|---|
| 8.8Latest | September 28, 2026 | — | 64-bit EXE (Inno Setup)ARM64 EXE (Inno Setup) |
| 8.7 | August 16, 2026 | — | ARM64 EXE (Inno Setup)64-bit EXE (Inno Setup) |
| 8.6 | July 17, 2026 | — | ARM64 EXE (Inno Setup)64-bit EXE (Inno Setup) |
| 8.5 | May 11, 2026 | — | ARM64 EXE (Inno Setup)64-bit EXE (Inno Setup) |
| 8.4 | April 6, 2026 | — | ARM64 EXE (Inno Setup)64-bit EXE (Inno Setup) |
| 8.3 | March 17, 2026 | — | 64-bit EXE (Inno Setup)ARM64 EXE (Inno Setup) |
| 8.2 | February 7, 2026 | — | ARM64 EXE (Inno Setup)64-bit EXE (Inno Setup) |
| 8.1 | January 26, 2026 | — | ARM64 EXE (Inno Setup)64-bit EXE (Inno Setup) |
Install from the command line
Silent install ›winget install --id Primecount.Primecount -ePrimecount-8.8-win-x64.exe /VERYSILENT /SUPPRESSMSGBOXES /NORESTART /SP-Related guide: How to use winget: install and update apps
Also for other systems
brew install primecountInformation
- Publisher
- Kim Walisch
- Category
- Terminals & CLI tools
- Licence
- BSD 2-Clause
- Price
- Free
- Source code
- github.com/kimwalisch/primecount
- Written in
- C++
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, ARM64
- Installer
- EXE (Inno Setup)
- Version
- 8.8
- Released
- September 28, 2026
- Added to the catalogue
- March 30, 2021
- Versions listed
- 30
- Updates / year
- 5.5
- GitHub stars
- 365
- GitHub forks
- 49
- Website
- github.com
- winget ID
- Primecount.Primecount
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is Primecount free?
Yes. Primecount is open-source software under the BSD 2-Clause licence.
Is Primecount safe to download?
The download comes from github.com, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install Primecount with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can Primecount be installed silently?
Yes. The silent install page lists the exact command for each installer.
Does Primecount run on ARM (Windows on Arm)?
Yes, there is a native ARM64 installer.
Where can I download an older version of Primecount?
The versions page lists all 30 versions with links to their official installer files, back to March 30, 2021.
What are alternatives to Primecount?
PowerShell, Oh My Posh, QPDF, yq and Alacritty. The alternatives page compares them.
