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Project News - PrimeGrid

Started by Cruncher Pete, May 12, 2009, 12:31:21 PM

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BF

From the PrimeGrid news feed:

100M Cobblestones

Saturday, 25 July 2009 12:40 AM

Congratulations to SETI.Germany, the first team to reach 100M cobblestones at PrimeGrid...doubling their 50M cobblestone achievement in only 5 1/2 months!!!  Is 150M in their sights by year's end?  We'll have to wait and see.  Again, congratulations!   :)

BF

From the PrimeGrid news feed:

New AP24's Found

Saturday, 25 July 2009 4:35 AM

While there were no AP24+ found during the Challenge, two AP24's actually were found in the hours leading up to the start.  The finders are Andreas Mohr (andmore) of Germany and Tina Kent (Penguirl) of the United States.  Andreas' progression is written as 19471368812966089+410682*23#*n for n=0..23 and Tina's progression is written as 20909681071069667+234797*23#*n for n=0..23.  Both were found in the AP26 Search.For more details on these finds and the AP26 search, please see the following forum posts: Andreas' AP24 | Tina's AP24.

BF

From the PrimeGrid news feed:

New AP24 Found

Friday, 31 July 2009 12:10 AM

PrimeGrid has found a new AP24 (Arithmetic Progression of 24 primes). The finder is Jeffrey D Sessler (Tostada) of the United States.  He is a member of team Ars Technica.  The progression is written as 20187352211709911+1799216*23#*n for n=0..23.  It was found in the AP26 Search.For more details on this find and the AP26 search, please see this forum post.

BF

From the PrimeGrid news feed:

World Record Cullen Mega Prime returned

Sunday, 2 August 2009 1:40 AM

As unbelievable as it may sound, another Cullen Mega Prime has been discovered!!!  It is only the 16th known Cullen prime. It is also a top 15 prime at over 2M digits and the largest found by LLR. Additionally, it is PrimeGrid's largest prime to date. The discoverer is from Japan and a member of Team 2ch.  Verification is in progress.  Stay tuned for more details.

BF

From the PrimeGrid news feed:

New AP24 Found

Tuesday, 4 August 2009 3:05 AM

PrimeGrid has found a new AP24 (Arithmetic Progression of 24 primes)...the first by a PS3!!! The finder is Paolo Bassi ([FVG] bax) of Italy.  He is a member of team BOINC.Italy.  The progression is written as 25545151920212759+1140241*23#*n for n=0..23.  It was found in the AP26 Search.

For more details on this find and the AP26 search, please see this forum post.

BF

From the PrimeGrid news feed:

World Record Cullen Mega Prime found

Wednesday, 5 August 2009 12:45 PM

On 25 Jul 2009 1:11:48 UTC, PrimeGrid's Cullen Prime Search found another World Record Cullen Mega Prime:

6679881*26679881+1

The prime is 2,010,852 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 15th overall.  It is the largest known Cullen prime and the largest found Mega Prime using LLR.  This remarkable discovery comes less than 4 months after the last prime and is only the 16th known Cullen prime.Contact with PrimeGrid participant (spinner@) has not been returned. However, the participant is from Japan and is a member of Team 2ch.  The prime was found using an Intel Xeon L5420 @ 2.50GHz with 6 GB RAM running Windows XP Professional. This computer took about 71 hours 58 minutes to complete the primality test.More details to come after contact is made.

BF

From the PrimeGrid news feed:

World Record Twin Primes returned

Friday, 7 August 2009 2:20 AM

The search is finally over!!!  The Twin Primes have been discovered!!! Verification was quickly completed and the appropriate users are being contacted.  Credit will be shared between the finder, top producer in terms of M, top producer in terms of primes found, and top siever.  The Twin Primes were actually returned on the SAME!!! day as the Cullen Prime but were overlooked in the excitement of the Cullen.Work generation has been terminated so please select another project if TPS was your only project.  The project will remain active until all outstanding work has been returned and credited.  Stay tuned for more details.

BF

From the PrimeGrid news feed:

50M Cobblestones for SG Grid!!!

Monday, 10 August 2009 12:40 AM

Congratulations to SG Grid, for becoming the first single user account to reach 50M cobblestones at PrimeGrid.  An outstanding and amazing accomplishment after being here for less than 8 months.

veebee

Quote from: BF on August 12, 2009, 08:20:41 PM
Congratulations to SG Grid, for becoming the first single user account to reach 50M cobblestones at PrimeGrid.  An outstanding and amazing accomplishment after being here for less than 8 months.

the guy/ or girl, must have some amazing computers.. or a hell of a lot of them.. he (or she) has amassed a total of 106,295,496 credits  in his/ her 5 projects  that he/ she participates in , in only 8 months !  :shock
(an average of about 440,000 a day !)

BF

From the PrimeGrid news feed:

Sophie Germain Prime Search

Monday, 17 August 2009 1:55 AM

The long awaited debut of the Sophie Germain Prime Search has finally arrived.  To participate, select Sophie Germain Prime Search (LLR) on your PrimeGrid preferences page.  For more information, please see this forum post.

BF

From the PrimeGrid news feed:

The Dog Days of Summer Challenge
.
Monday, 17 August 2009 10:10 PM

The Dog Days are upon us!  PrimeGrid's Challenge series continues with the Dog Days of Summer Challenge.  Please come join us in ushering an end to the hot sweltering days of summer.  A 5 day (18-23 August) Challenge is being offered on PrimeGrid's Woodall Prime Search (LLR)) application.  Builds are available for Linux and Windows.  For more information, please see this forum thread.

BF

#26
From the PrimeGrid news feed:

Record AP25 Found


Thursday, 3 September 2009 12:40 AM

PrimeGrid has found a record AP25 (Arithmetic Progression of 25 primes). This is PrimeGrid’s second AP25 and only the third known.  It has an ending term of 37814740008933889 surpassing the old record of 15523154536267043. The finder is Jochen Beck (dh1saj) of Germany.  He is a member of team SETI.Germany. The progression is written as 20919497549238289+3155495*23#*n for n=0..24.  It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post.

BF

From the PrimeGrid news feed:

Megadigit Probable Prime Found

Thursday, 3 September 2009 10:00 AM

Congratulations to Ben Maloney (paleseptember) who discovered the megadigit probable prime 2^4583176+2131. At 1,379,674 decimal digits, this is the first known probable prime with over a million digits.  It should soon appear as the new probable prime record at the website of Henri and Renaud Lifchitz, PRP Records: Probable Primes Top 10000.
Ben is participating in the project "Five or Bust" - The Dual Sierpinski Problem.  This project is outside of PrimeGrid and can be located in the Mersenne forum.  For additional information about this project, please see the Welcome to "Five or Bust!" thread.  There are only 2 remaining sequences.  To help with PRP testing, see this thread.  To help with sieving, see this thread.

Hurricane

PrimeGrid's 2010 Challenge Series. The Winter Solstice Challenge Start's... now!

http://www.primegrid.com/  :rocks
https://valid.x86.fr/f3pegw
AMD Ryzen 7950X3D @ 4193.54 MHz, 1x Gigabyte NVIDIA RTX 4080 SUPER.

AMD Ryzen Threadripper 1950X @ 3391.91 MHz, 1x NVIDIA TITAN X PASCAL. (Retired)
Intel Core i7-5960X @ 3498.56 MHz, 1x NVIDIA TITAN X PASCAL. (Retired)
Intel Core i7 3960X @ 4513.26 MHz, 1 x NVIDIA GeForce GTX 590. (Retired)
Intel Core 2 Extreme QX9650 @ 4000.47 MHz, 1 x NVIDIA GeForce 8800 Ultra. (Retired)

Dataman

Congradulation's Brett!!!  v:

2011-01-18: PrimeGrid - Mega Prime found for The Riesel Problem
On 14 Jan 2011 9:03:07 UTC, PrimeGrid?s The Riesel Problem project eliminated k=428639 by finding the Mega prime: 428639*2^3506452-1

The prime is 1,055,553 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 29th overall. This is the 2nd largest prime found in The Riesel Problem and PrimeGrid's second elimination in 2 months. 62 k's now remain.

The discovery was made by Brett Melvold of Australia using an Intel i7 920 @ 2.67GHz with 6GB RAM, running Windows 7. This computer took 11 hours and 13 minutes to complete the primality test using LLR. Brett is a member of the BOINC@AUSTRALIA team.