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News
426 items
News 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.
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…
[5.5.2.0], 2026-11-01, leisure
5.5.2.0 is a leisure release: 512 merged pull requests since 5.5.1.0, about 1,900 commits from
five contributors across 683 source files. It adds roughly 940 unit test cases and a new functional
test suite of 53 tests that runs in CI.
No consensus rule changes activate in this release. It carries a set of block version 15 rules
that stay inactive until a later mandatory release schedules them (see
Consensus changes carried, not active). 5.5.2.0 nodes and
5.5.1.0…
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.
Gridcoin 5.5.1.15 - Testnet Release
This is a testnet pre-release carrying one merged pull request since 5.5.1.13-testnet
(31 October 2026). It changes one step of how the miner assembles a block.
As with 5.5.1.5 through 5.5.1.13, no consensus rule change activates in this build.
Please run it, use it normally, and report anything that looks wrong.
Read this first
Coming from 5.5.1.11 or earlier? Read the
5.5.1.13-testnet notes
first. Everything there still applies.
Multiprocess users can…
Gridcoin 5.5.1.13 - Testnet Release
This is a testnet pre-release covering 11 merged pull requests since 5.5.1.11-testnet
(27 October 2026). Most of it falls into four areas:
the Debian 12 and 32-bit x86 failures found by the OBS package builds, now fixed and built in CI;
the miner's ordering of block candidates, now exact on every platform;
how the node handles peer messages;
the GUI's theme switching and the staking tooltip.
As with 5.5.1.5 through 5.5.1.11, no consensus rule change…
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
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.
Gridcoin 5.5.1.11 — Testnet Release
This is a testnet pre-release covering 34 merged pull requests since 5.5.1.9-testnet
(15 October 2026). It is a smaller release than 5.5.1.9. Most of it falls into four areas:
the wallet's handling of its own unconfirmed sends;
beacon advertisements that could get stuck;
Windows data directories and wallet files with non-ASCII names;
the build itself, which now compiles with no warnings on every CI platform and fails CI if one appears.
Several more v15…
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 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…
Gridcoin 5.5.1.9 — Testnet Release
This is a testnet pre-release covering 152 merged pull requests since 5.5.1.7-testnet
(25 August 2026). Most of it is correctness work, and most of that is in the wallet:
how the wallet is unlocked;
what happens to your unconfirmed transactions across restarts, evictions and reorgs;
what the staking balance counts.
There is also a round of voting fixes, a reworked network time sampler, stability fixes for Windows
and macOS, and several v15 consensus changes…
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.
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…
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.
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…
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…
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!
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…
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.
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