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Czech National Team
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World Record Fermat Divisor Found!  |
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On 22 January 2020, 15:00:58 UTC, PrimeGrid's Fermat Divisor Search found the Mega Prime:
13*2^5523860+1 Divides F(5523858)
The prime is 1,662,849 digits long and will enter Chris Caldwell's The Largest Known Primes Database ranked 115th overall. This is a world record for prime Fermat divisors, and it is also ranked 4th for “weighted” prime Fermat divisors.
The discovery was made by Scott Brown (Scott Brown) of the United States using an Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz with 16GB RAM, running Microsoft Windows 10 Core x64 Edition. This computer took about 39 minutes to complete the primality test using multithreaded LLR. Scott is a member of the Aggie The Pew team.
The prime was verified on 22 January 2020, 15:11:39 UTC by Stefan Larsson (288larsson) of Sweden using an Intel(R) Core(TM) i9-9900K CPU @ 3.60GHz with 8GB RAM, running Microsoft Windows 10 Core x64 Edition. This computer took about 46 minutes to complete the primality test using multithreaded LLR. Stefan is a member of the Sicituradastra. team.
For more details, please see the official announcement.
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| Large scale experiment: MDAD |
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We are starting a new large-scale experiment. There will be plenty of workunits, whose very first batch is currently being sent. Run times should be around 6h but with a lot of variability. They are very heterogeneous so please don't worry for failures.
Thanks! -Toni
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| Server outage - uploads failing |
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Due to a network problem in the CERN computer centre early Thursday morning, our BOINC servers have lost access to a storage cluster. Hence uploads are failing and access to web pages as well. Hopefully this should be fixed soon.
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| Server outage - uploads failing |
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Due to a network problem in the CERN computer centre early Thursday morning, our BOINC servers have lost access to a storage cluster. Hence uploads are failing and access to web pages as well. Hopefully this should be fixed soon.
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| Another GFN-262144 Find!! |
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On 21 January 2020, 00:49:54 UTC, PrimeGrid's Generalized Fermat Prime Search found the Mega Prime:
9450844^262144+1
The prime is 1,828,578 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 15th for Generalized Fermat primes and 85th overall.
The discovery was made by Jacob Eikelenboom (Eikelenboom) of The Netherlands using an NVIDIA GeForce RTX 2060 in an Intel(R) Core(TM) i7-9700F CPU @ 3.00GHz with 16GB RAM, running Microsoft Windows 10 Core x64 Edition. This GPU took about 18 minutes to complete the probable prime (PRP) test using GeneferOCL2.
The prime was verified on 21 January 2020, 02:35:41 UTC by Igor Keller (IKI) of France using an NVIDIA GeForce GTX 1080 in an Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz with 16GB RAM, running Microsoft Windows 8.1 Professional with Media Center x64 Edition. This computer took about 26 minutes to complete the probable prime (PRP) test using GeneferOCL2. Igor Keller is a member of the Gridcoin team.
The PRP was confirmed prime by an Intel(R) Xeon(R) CPU E3-1240 v6 @ 3.70GHz with 4GB RAM, running Linux Debian. This computer took about 17 hours, 52 minutes to complete the primality test using LLR.
For more details, please see the official announcement.
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| another server outage today (done) |
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The ASUS mainboard arrived and have the same issues. Now I need to change the CPU cooler.
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| 12-digit factor of P2203 has now been found by the project... |
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...220343 times - still no sign of any larger factors
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| Low available work. |
For a couple of reasons, the result table has grown to the point where it no longer fits in main memory. That has been slowing the validators and assimilators, which is causing the result table to grow further.
We'd like to get it down to a manageable size before our Tuesday outage. To that end we are throttling work generation to a rate at which the table size is shrinking. We hope that this rate will increase as the table gets smaller.
So for the next few days work will be hard to come by (but not zero).
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| base R941 Megaprime |
On 28th of December 2019, Max_Pirx, a member of the team Gridcoin has found a megaprime 74*941^348034-1 for base R941. The prime has 1.034.913 digits and entered the TOP5000 in Chris Caldwell's The Largest Known Primes Database.
Well done!
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| server outage today (done) |
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I have got the 2nd motherboard but have the same issues as before. I need the current power supply to test with.
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| New Runs for MilkyWay@home N-Body (1/15/2020) |
Happy New Year everyone!
I hope you all had a fantastic new year's celebration. To start off the new year, I thought we should put up a few new runs for Nbody as the previous one have converged nicely. The new runs I put up are:
-de_nbody_01_15_2020_v176_40k__sim__7
-de_nbody_01_15_2020_v176_40k__sim__8
-de_nbody_01_15_2020_v176_40k__sim__9
Thank you all for your continued support, and I wish you all the best for the new decade.
-Eric
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| Why do people run SETI@home? |
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Check out Stars in Their Eyes?, a research paper from the University of Geneva about why people run SETI@home.
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| Results of the first half of the January 2020! |
Dear participants!
Very unusual half of winter with the air temperature between -5..+3 has passed. (But maybe a normal one if we review not last scores but last thousands of years!) The last weeks are not a time of snow, but a time of ice that formed at night from snow melted during the day. And crystals of ice from a nice photography became the basis of badge of this month! 131 participants received it and we congratulate them:
rz and [AF>Amis des Lapins] Phil1966 (L'Alliance Francophone),
KVV and KWSN-SpongeBob SquarePants (The Knights Who Say Ni!),
Mite and [AF>Amis des Lapins] Ceclo (L'Alliance Francophone),
KySU and [AF>Kirass>MPF] Nafrayou (L'Alliance Francophone),
Geoff and [AF>Libristes]MortelKni (L'Alliance Francophone),
Klyon and [AF>Libristes]cguillem (L'Alliance Francophone),
kt kt and [AF>EDLS] Jakez Sulli (L'Alliance Francophone),
arkiss and Международная база наблюдений комет (Karelia),
Heikki and Haddington @ team Carl Sagan (Carl Sagan),
Dakkar and blaircart (Sorry for Grand Ol' Partying),
raddoc and scole of TSBT (The Scottish Boinc Team),
Wojtek and Johnbodlis team (Czech National Team),
mcf2020 and Michael H.W. Weber (Rechenkraft.net),
zgf2022 and Technik007[CZ] (Czech National Team),
Leonmer and zelandonii (L'Alliance Francophone),
fstadin and Egon olsen (Meisterkuehler.de Team),
yuryInOz and LeChat51X (L'Alliance Francophone),
AudioElf and Aleksander Parkitny (BOINC@Poland),
DRandolph and Duce H_K_ (L'Alliance Francophone),
koronabora and Exnihilo Curatio (Crunching@EVGA),
Roger Merkl and Thyler Durden@P3D (Planet 3DNow!),
Mark Sechin and Stephen Uitti (Project Blue Book),
ArgentSmith and Dmitriy Otroschenko (Russia Team),
GreyWanderer and Rhodan71 (L'Alliance Francophone),
Bok (SETI.USA) and Thierry (L'Alliance Francophone),
AKolesnichenko and Matthias Lehmkuhl (SETI.Germany),
Laurent Cheylat and Deathlike (Czech National Team),
Morgan the Gold and Johannes Elsner (Planet 3DNow!),
Alexey Chuharev and joe carnivore (Rechenkraft.net),
FourOh (SETI.USA) and owensse (The Planetary Society),
JohanL (BOINC.BE) and Alez (The Scottish Boinc Team),
Oleg (Russia Team) and Wabi CZ (Czech National Team),
Vova (Russia Team) and pah (L'Alliance Francophone),
marsinph (BOINC.BE) and Shaman (Czech National Team),
vaughan (AMD Users) and boceli (Czech National Team),
Dante (TSC! Russia) and ShmyaCluster (Crystal Dream),
Werinbert (Free-DC) and killik (Czech National Team),
genek (BOINC@Poland) and Bigos2 (Czech National Team),
JonS (UK BOINC Team) and Fardringle (TeAm AnandTech),
axels (SETI.Germany) and [SG]ATA-Rolf (SETI.Germany),
m4gu5 (SETI.Germany) and stoneageman (XtremeSystems),
William Lathan (USA) and Ralfy (BOINC Confederation),
jozef j (Russia Team) and respawner (Rechenkraft.net),
Administrator {11320} and [B@P] Daniel (BOINC@Poland),
RFGuy_KCCO ([H]ardOCP) and bcavnaugh (Crunching@EVGA),
BOINC.RU (Russia Team) and ReaDy (Astronomy.Ru Forum),
JagDoc (Planet 3DNow!) and MechWarrior (Ars Technica),
matszpk (BOINC@Poland) and gemini8 (Rechenkraft.net),
blitzzkreeg (Gridcoin) and Diffident (Overclock.net),
Dan Sargent (SETI.USA) and Roadranner (SETI.Germany),
Soderstromm (Gridcoin) and ChelseaOilman ([H]ardOCP),
emoga (TeAm AnandTech) and Vincent Dark (Team China),
whizbang (Ars Technica) and Landjunge (Planet 3DNow!),
ssjy806 (SETIKAH@KOREA) and CoolAtchOk (Russia Team),
Shmya-2 (Crystal Dream) and freestman (Chinese Dream),
Woodles (UK BOINC Team) and [SG]steini (SETI.Germany),
Spritex (BOINC@Denmark) and LCB001 (Hardware Canucks),
Opolis (Crunching@EVGA) and [H]auntjemima ([H]ardOCP),
sergamena (Russia Team) and HK-Steve (Crunching@EVGA),
kashi (BOINC@AUSTRALIA) and hase (SETI-team-hannover),
LordNicky (Russia Team) and n2morrow (SETIKAH@KOREA),
MontanaMax (Team China) and Nikita Yang (Team China),
shirawa@meow (Team 2ch) and muzzdiez (SETIKAH@KOREA),
Dingo (BOINC@AUSTRALIA) and Bulgakoff* (Russia Team),
terry mora (The Geezers) and Paulteo (Crunching@EVGA),
hoarfrost (Crystal Dream).
And some statistics of findings of the first half of the month:
Degree 81: 1869903
Degree 82: 443971
Degree 83: 96092
Degree 84: 18744
Degree 85: 3242
Degree 86: 568
Degree 87: 70
Degree 88: 16
Degree 89: 0
...
Degree 100: 0
Thank you fro attention to the project and participation!
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| new 2020 goals published |
https://www.mersenneforum.org/showthread.php?t=13196
https://www.mersenneforum.org/showthread.php?t=25111
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| Project stopped (hopefully temporarily) |
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due to excessive demand
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| 2019 Year in Review |
So another year has come and gone. It has been a very productive year. Here are the highlights:
1. The results for the septic search, which were completed in 2018, were accepted and published in The Journal of Number Theory.
2. A GPU app was developed for the decic search. Versions were eventually introduced for both Nvidia and AMD cards, and for both the Linux and Windows Platforms. During development, I discovered an opportunity for optimizing the CPU version which was subsequently implemented.
3. The decic app completed the search over ℚ(√-5) (subfield 5).
4. The decic app completed the search over ℚ(√-2) (subfield 4).
5. Searches were completed over the lower discriminant bounds for subfields 6 and 7.
6. The search over ℚ(√2) (subfield 3) progressed further into the higher tiers. We now only have 3 more tiers to go in that search.
Thanks everyone and have a wonderful New Year!
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| Happy New Year! |
Dear participants!
On September 24, we made a report about RakeSearch project in the conference Russian Supercomputing Days'2019. Our paper about it was included in an issue of Communications in Computer and Information Science, volume 1129. Due to copyright limitations, we cannot put the full text into public access, but we place a link into the personal account page of any participant who passed the 5000 Cobblestones milestone of the total credit.
Thank you for participation!
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| A new fundraiser for SETI storage! |
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Mr. Kevvy and the GPU Users Group have graciously convened a fundraiser to help modernize our aging storage infrastructure. Thank you Mr. Kevvy and GPUUG!
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| P2203:130000000 wu's (of 10000 trials each equiv.) processed! |
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Thanks to all the users. Please keep crunching!
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| Happy new year from GPUGRID... |
...we may be late for the merry Christmas wishes, but not for wishing you a wonderful 2020 :)
The project scientists
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