We’ve rolled out new 64-bit Windows versions of the 14e, 15e and 16e lattice sievers. They’re built from the current lasieve5 code, so Windows machines run better on newer, larger jobs that the old Windows apps couldn’t handle. They’re also quicker. If your CPU supports AVX-512, the app uses it automatically, and on our test machine that was about 1.4–1.6 times faster.
The few of you who still use Windows 7 or 8.1 may need one small update from Microsoft. The new apps need Microsoft’s “Universal C Runtime”. Most machines already have it, but some don’t. If yours doesn’t, NFS@Home tasks will fail right away with an error like:
exit code -1073741515 (0xc0000135)
Check first: if the file C:\Windows\System32\ucrtbase.dll exists, you already have it. If it’s missing, install the update one of these ways:
Windows Update (easiest). Open Windows Update and install the recommended updates. The one you’re after is called “Update for Universal C Runtime in Windows”.
Direct download:
Windows 7 SP1, 64-bit:
https://www.microsoft.com/en-us/download/details.aspx?id=51161
Download Windows6.1-KB3118401-x64.msu and run it. Windows 7 needs Service Pack 1 installed first.
Windows 8.1, 64-bit: search the Microsoft Update Catalog:
https://www.catalog.update.microsoft.com/Search.aspx?q=KB3118401
Download “Update for Windows 8.1 for x64-based Systems (KB3118401)”. It needs the April 2014 update (KB2919355), which almost all 8.1 machines already have.
Windows 8 (not 8.1): Microsoft no longer offers this update for Windows 8. Please upgrade to 8.1 (it’s free).
Restart if Windows asks you to. New tasks should then run normally. Any tasks that already failed will be sent to other computers, so no work is lost.
Thanks for participating, and let us know on the forums if you run into anything!
View article · Thu, 5 Nov 2026 07:53:01 +0000
From November 6 18:00 to November 13 18:00 PrimeGrid will be running a 7 day challenge on the Generalized Cullen/Woodall project. For more information, please see this forum thread.
View article · Sun, 1 Nov 2026 06:26:46 +0000
Sightus@CAU, a member of the team Planet 3DNow! found a megaprime for base S579.
The prime 6*579^725792+1 has 2.005.131 digits and entered the T5k PrimePages.
The base S579 has been proven!
This is the first find of the year
View article · Fri, 30 Oct 2026 07:55:53 +0000
As some of you may have already noticed, the site was unavailable for more than a day.
This outage was widespread and marks the second such occurrence this year.
We have extended the grace period to 72 hours to compensate for this downtime.
Please do not cancel any tasks for which the deadline has already passed; these should still be validated. If you encounter any issues, please let us know.
We apologize for the inconvenience.
View article · Thu, 29 Oct 2026 12:57:13 +0000
Computing power · Certificate · Poll · Teams
Programmers:
Server outage
The server that hosts the BOINC web site, Science United, and BOINC Central, was offline from 3 Sept until today. There was a maintenance issue that arose suddenly, and took much longer than we anticipated. We apologize for the inconvenience. If something like this happens again we'll try to find a substitute server to keep everyone informed.
10 Sep 2026, 7:49:25 UTC
· Discuss
BOINC Dashboard available for Linux
BOINC Dashboard is lightweight, self-hosted web dashboard for monitoring a BOINC client running on a local machine, without needing to open BOINC Manager and reconnect every time.
23 Aug 2026, 1:32:10 UTC
· Discuss
Willy de Zutter has passed away
We are deeply saddened to learn of Willy's passing; some details are here. Willy was a staunch and tireless supporter of BOINC from its earliest days; he created BAM! and BOINCstats, widely-used account manager and statistics sites. He will be remembered, and missed.
28 Jul 2026, 21:00:01 UTC
· Discuss
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