Lehmer's Birthday Challenge
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.
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News
411 itemsNews of the research projects that Gridcoin pays for and of the Gridcoin releases, newest first. Press releases that companies pay to publish here are in the list too, marked as sponsored: Gridcoinstats does not write them and does not stand behind what they say.
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base S579 Megaprime and proven!
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
cable provider down
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.
base S60 Megaprime
Sightus@CAU, a member of the team Planet 3DNow! found a megaprime for base S60. The prime 853*60^613855+1 has 1.091.530 digits and entered the T5k PrimePages.
New Faster Apps Coming Soon
New optimized versions of the GetDecics app have been discussed in other threads, but I thought it best to start a new thread. First, a thank you to Alperen for optimizing the current apps. Yes, he used Claude, but that's not necessarily a bad thing. I don't have the experience required or the time to learn the AVX tricks that were used here. So without Alperen and Claude, this probably never would have happened. I have spent many hours going through the new code. The original code was…
base R235 Megaprime
vaughan, a member of the team BOINC@AUSTRALIA found a megaprime for base R235. The prime 3788*235^455521-1 has 1.080.075 digits and entered the T5k PrimePages.
base S52 Megaprime
Science United found a megaprime for base S52. The prime 25492*52^638823+1 has 1.096.227 digits and entered the T5k PrimePages.
New models published
It's my pleasure to announce a new paper based on A@H computations with about 30,000 asteroid models reconstructed from survey photometry. This triples the number of asteroids with a shape model. The paper is available at the Astronomy and Astrophysics journal page: https://www.aanda.org/component/article?access=doi&doi=10.1051/0004-6361/202662316 or at Arxiv: https://arxiv.org/abs/2610.06082. The models are available at Zenodo: https://doi.org/10.5281/zenodo.22812438 and will also be placed…
base S298 Megaprime
Sightus@CAU, a member of the team Planet 3DNow! found a megaprime for base S298. The prime 168*298^566667+1 has 1.402.059 digits and entered the T5k PrimePages.
MVP Kevin Bernhagen
In 2002, Kevin Bernhagen realized that his powerful G4 mac was just sitting idle most of the time. That seemed like a shame, so he went looking for productive work for it to do. His search led him to…
BOINC Games challenge 09/25/2026 04:00 (UTC)-09/28/2026 04:00 (UTC)
The project was selected. Good luck everyone!
Testing GPU Sieving on Apple silicon Macs
A test version of the GPU sieving application is now available for Apple silicon Macs (M1 and newer). The cuda-sieve code has been ported to Apple’s Metal GPU API, allowing the integrated GPUs in Apple M-series processors to participate in the sieving work. This is a new port and has had relatively limited testing, so additional testing across the different generations of Apple silicon would be very helpful. If you have an M1, M2, M3, M4, or newer Mac, please give it a try and let us know how…
GPU sieving
Work has progressed nicely on the GPU sieving apps based on cuda-sieve. Linux and Windows apps are now available for NVIDIA GPUs, with support extended to Maxwell (such as the GTX 970) and newer GPUs with at least 4 GB of GPU memory. For AMD, the code has been ported using HIP, and a Windows app is now available supporting all RDNA-based GPUs (Radeon RX 5000 series and newer) with at least 4 GB of GPU memory. If you have a supported GPU, give it a try!
Cryptic pockets stay open in a crowd
Most structural models of proteins are limited in the same way a photograph is. They show one pose. In reality, a protein is full of moving parts, and as they move, gaps open up on its surface that…
P72 ECM factor!
User Weber462 found a 72-digit prime factor of an XYYXF number using ECM. This is the largest ECM factor found this year, and the 31th largest of all time.
Formula BOINC 2026-09-03 16:00 UTC - 2026-09-06 16:00 UTC
Thx to get part of it!
Server issues resolved
For the past few days a protection module on our web server was rejecting a large share of incoming requests. It affected not only the website, but also scheduler requests and result uploads, so many of you ran into failed uploads and reports, and pages that loaded only every other try. The cause has been identified and the module is now switched off. The website, the scheduler and the upload server are all responding normally again. There is nothing you need to do — the BOINC client retries…
base S136 Megaprime
SkyHighWeFly, a member of the team Antarctic Crunchers found a megaprime for base S136. The prime 16165*136^487629+1 has 1.040.380 digits and entered the T5k PrimePages.
CUDA-based GPU sieving test
A new GPU lattice sieve for NFS, cuda-sieve, was recently released. A new app has been added to NFS@Home to test this. Currently, it's only available for nVidia Ampere or higher GPUs running x86_64 Linux. Once the code stabilizes, additional platforms will be added.
Downtime Wednesday August 12
This Wednesday (August 12, 2026) our Internet Service Provider at the Leibniz University Hannover is conducting an extended maintenance of the network infrastructure. Because of this our project will be unreachable between approximately 4 AM and 7 AM UTC.
Holiday time
Hi, it is holiday from 7/8 to 22/8 I hope that all will be fine during that time