distributedcomputing.info

New News :: RE: 3x+1 Project News

Author: Jwb52z
Posted: Sun Dec 04, 2011 12:30 am (GMT 0)
Topic Replies: 81

Currently : Countdown to 14*2^53 (~126,101 E+12) : 185 blocks to go.
November 11 2011 : All blocks up to 120,020 completed. One class record confirmed.
October 30 2011 : All blocks up to 118,400 completed, passing 13.253 (~117,094 E+12)
October 16 2011 : All blocks up to 117,000 completed. One more class record confirmed.

New News :: RE: GIMPS Project News

Author: Jwb52z
Posted: Sun Dec 04, 2011 12:28 am (GMT 0)
Topic Replies: 1

December 1, 2011: Double-checking proves M(24036583) is the 41st Mersenne prime.
December 25, 2010: All exponents below M(37156667) tested at least once.
December 25, 2010: All exponents below M(32582657) tested at least once.
July 11, 2010: Double-checking proves M(20996011) is the 40th Mersenne prime.

New News :: RE: 3x+1 Project News

Author: Jwb52z
Posted: Sat Sep 10, 2011 11:58 pm (GMT 0)
Topic Replies: 81

Currently : Countdown to 13*2^53 (~117,094 E+12) : 29 blocks to go.
September 1 2011 : All blocks up to 113,080 completed. One more class record confirmed.
July 31 2011 : All blocks up to 110,040 completed. One more class record confirmed.
July 23 2011 : All blocks up to 107,500 completed. Delay record 2254 and three class records confirmed.
July 21 2011 : All blocks up to 102,400 completed.
July 12 2011 : All blocks up to 99,200 completed.
June 7 2011 : All blocks up to 97,600 completed.
April 13 2011 : All blocks up to 97,080 completed. Delay Record 2091 and two other class records confirmed.
November 27 2010 : All blocks up to 92,380 completed.
November 17 2010 : All blocks up to 91,880 completed. Three class records confirmed.
October 7 2010 : All blocks up to 90,660 completed.

New News :: RE: Distributed Search for Fermat Number Divisors Project News

Author: Jwb52z
Posted: Mon Jul 04, 2011 7:08 pm (GMT 0)
Topic Replies: 18

July 1, 2011
PrimeGrid strikes again!
On 1 July 2011 02:59:41 UTC, PrimeGrid's Proth Prime Search project, through PRPNet, found a prime Fermat divisor: 3771*2^221676+1 is a Factor of F226170!!!.
The prime is 66,736 digits long. It is the 6th divisor found in 2011 and 289th overall.
The discovery was made by Mark Doom of the United States using an AMD Phenom II X6 1090T with 2 GB RAM running Windows 7 x64. This computer took 40 seconds to complete the primality test using LLR.
The credits for the discovery are as follows:
1. Mark Doom (United States), discoverer
2. PrimeGrid, et al.
3. Srsieve, sieving program developed by Geoff Reynolds
4. PSieve, sieving program developed by Ken Brazier and Geoff Reynolds
5. LLR, primality program developed by Jean Penn�
6. OpenPFGW, a primality program developed by Chris Nash and Jim Fougeron with maintenance and improvements by Mark Rodenkirch
Congratulations go to Mark and to the leading organizers of PrimeGrid!

New News :: RE: Distributed Search for Fermat Number Divisors Project News

Author: Jwb52z
Posted: Sun Jun 26, 2011 9:26 pm (GMT 0)
Topic Replies: 18

June 23, 2011
New Fermat factor discovered after 1 day!
7333*2^138560+1 is a Factor of F138557!!!.
The factor was discovered by Dirk D'huyvetters of Belgium coadiuvated by the PrimeGrid team. This is the 288th known divisor fifth factor found this year.
This factor was the first of the three disconvered in March, but only during the recent double-checking for GFN divisibilities the factor was revealed, as the team was focused on Proth Primes and not Fermat factors.
Congratulations go to Dirk and to the leading organizers of PrimeGrid: John Blazek, Rytis Slatkevičius and Lennart Vogel!
-
June 22, 2011
New record-size Fermat factor!
As part of PrimeGrid's Proth Prime Search, Scott Brown (USA) found the following new factor of a Fermat number: 9*2^2543551+1 is a Factor of F2543548!!!.
This factor 765,687 digits long exceeds in size the prime factor 3* 2^2478785+1 of F2478782 discovered on October 10, 2003 and therefore is currently the largest known divisor of a Fermat number!
Congratulations to everyone involved in this remarkable discovery!!
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March 20, 2011
New Fermat factor after 5 days!
111318179143061*2^45+1 is a Factor of F42!!!.
The factor was discovered by Roman Maznichenko from Russia using Mark Rodenkirch's GMP-Factor. This is the first factor found by GMP-Factor.
Roman worked hard on ECM also, and we all hope he will find another factor soon.
Congratulation, Roman!
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March 15, 2011
Second Fermat factor of 2011!
14783975791554494074552473179612897725474511*2^19+1 is a Factor of F17!!!.
The factor was discovered by David Bessell from St Michael's Collegiate School in Australia using Prime95. This is the third factor found by David while computing ECM curves on small Fermat numbers.
The cofactor of F17 has around 39,000 digits, and has been proven composite.
Congratulation, David!
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February 21, 2011
FermatSearch.org has a new server ! To guarantee better performances to our users, your webmaster has taken the opportunity to upgrade the old hardware and install a new more powerful one. Please let me know about every possible glitch that may have occurred during the migration of data.
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February 5, 2011
GMP-Fermat 2.1 for Windows 64 bit version has passed its checks!!!.
Thanks to Matt Anderson (who addressed the issue on MersenneForum) and Brian Gladman (who offered his programming skills), we now finally have a GMP-Fermat version with superfast assembly routines written by Geoff Reynolds and running on Windows 64-bit platforms!
The new executable can be found on the Download page. Wonderful job, Brian and Matt, thank you!
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January 12, 2011
First Fermat factor of 2011!
837747239*2^1203+1 is a Factor of F1201!!!.
The factor was discovered by our old friend Maximilian Pacher, from Austria, using NewPGen, PRP and PFGW programs. Maxi could have found this factor seven years ago if his range were not limited to 1200.
This is his fourth Fermat factor"
Congratulation, Maxi!
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December 9, 2010
GMP-Fermat 2.1 for Windows 64 bit version is out!!!.
Thanks to Matt Anderson (who addressed the issue on a forum) and Brian Gladman (who offered his programming skills), we now finally have a GMP-Fermat version with superfast assembly routines written by Geoff Reynolds and running on Windows 64-bit platforms!
The new executable can be found on the Download, http://www.fermatsearch.org/download.html , page. Wonderful job, Brian and Matt, thank you!
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November 20, 2010
A second new Fermat factor has been found on November 20!
272392805475*2^304+1 is a Factor of F299!!!.
The factor was discovered by Alexey Komkov, from Russia, using his own program written in Borland C++ builder. Alexey has been testing a huge range using 30 P4 computers in the last 6 months.
Congratulation, Alexey!
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November 8, 2010
A totally new Fermat factor has been found!
103257279*2^2422+1 is a Factor of F2420!!!.
The factor was discovered by Peter Strasser, from Austria, on November 7th, 2010. Peter was testing a huge range with his own program based on Mathematica.
Congratulation, Peter!

New News :: RE: Operation Billion Digits Project News: Level Progress

Author: Jwb52z
Posted: Sat Jun 04, 2011 4:45 am (GMT 0)
Topic Replies: 15

Progress is Now at Level 15.07

New News :: RE: XYYXF Project News

Author: Jwb52z
Posted: Sat Jun 04, 2011 4:43 am (GMT 0)
Topic Replies: 35

Monday, May 30th, 2011. All the composites passed ECM tests with B1 = 11M.
Monday, May 2nd, 2011. The ECM server, http://xyyxf.at.tut.by/news.html#ecms , retired from the work after nine years of activity. Great thanks to Greg Childers who maintained the server for such a long time.

Thursday, March 31st, 2011. The total number of the composites was reduced to 1500.

Science :: distributed computer client with no "install"

Author: StephanieD
Subject: distributed computer client with no "install"
Posted: Mon May 30, 2011 10:14 pm (GMT 0)
Topic Replies: 0

I would like to find a distributed computing client that doesn't have to be "installed". Just an exe that could be run off a USB stick. I remember 10 or 15 years ago the old distributed.net "Bonvine" RC5 client would run off a floppy disk.

Does anyone know of such a thing these days?

My IT dept said they don't care if I run something like this, I am just not allowed to install anything.

New News :: RE: Operation Billion Digits Project News: Level Progress

Author: Jwb52z
Posted: Thu Feb 24, 2011 11:23 pm (GMT 0)
Topic Replies: 15

Progress is Now at Level 15.01

New News :: RE: XYYXF Project News

Author: Jwb52z
Posted: Thu Feb 24, 2011 11:19 pm (GMT 0)
Topic Replies: 35

Friday, February 18th, 2011. A probable prime with more that 300k digits, 314738^9 + 9^314738, is found by Anatoly Selevich. Congratulations to him!
Saturday, November 13th, 2010. The total number of the composites was reduced to 1600.

Sunday, September 19th, 2010. MSieve 1.47, http://www.sourceforge.net/projects/msieve , was released, http://www.mersenneforum.org/showpost.php?p=230386 .

New News :: RE: 3x+1 Project News

Author: Jwb52z
Posted: Sun Sep 05, 2010 8:54 pm (GMT 0)
Topic Replies: 81

September 1 2010 : All blocks up to 90,580 completed.
August 22 2010 : All blocks up to 90,000 completed. Two more class records confirmed.
July 25 2010 : All blocks up to 85,580 completed. One class record confirmed.
April 30 2010 : All blocks up to 83,800 completed. One class record confirmed.

New News :: RE: Operation Billion Digits Project News: Level Progress

Author: Jwb52z
Posted: Thu Jul 22, 2010 1:49 am (GMT 0)
Topic Replies: 15

Progress is Now at Level 14.05

New News :: RE: XYYXF Project News

Author: Jwb52z
Posted: Thu Jul 22, 2010 1:43 am (GMT 0)
Topic Replies: 35

Wednesday, June 30th, 2010. All the numbers up to x = 105 inclusively had been completely factored.
Wednesday, June 9th, 2010. G�ran Hemdal reported that three PRPs, 3782315 + 3153782, 3784315 + 3153784 and 37892932 + 29323789, were missing from the Primes, http://xyyxf.at.tut.by/primes.html#0 , page. Thanks to G�ran for double-checking the computations!

Tuesday, June 8th, 2010. This time RSALS, http://boinc.unsads.com/rsals , beat an SNFS record, http://xyyxf.at.tut.by/records.html#snfs , completing the factorization of the 242-digit cofactor, http://xyyxf.at.tut.by/records/c242_125_86.txt , of 125^86 + 86^125. Just have no words.

Financial :: Bitcoin

Author: TA_andy
Subject: Bitcoin
Posted: Thu Jul 15, 2010 5:15 pm (GMT 0)
Topic Replies: 0

anyone come across this before?
http://www.bitcoin.org/

New News :: RE: XYYXF Project News

Author: Jwb52z
Posted: Thu May 20, 2010 6:19 pm (GMT 0)
Topic Replies: 35

Thursday, April 22nd, 2010. A 62-digit, http://xyyxf.at.tut.by/records/p62_134_78.txt , factor of 13478 + 78134 was found with ECM, http://xyyxf.at.tut.by/records.html#ecm , by yoyo@home, http://www.rechenkraft.net/yoyo/ . An impressive, http://tech.groups.yahoo.com/group/xyyxf/message/2031 , record.
Wednesday, April 21st, 2010. The total number of the composites was reduced to 1700.