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[项目新闻] [BOINC][数学类]PrimeGrid

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发表于 2018-4-8 11:14:56 | 显示全部楼层

2018-04-05: PrimeGrid, ESP Mega Prime!

On 3 April 2018, 15:55:55 UTC, PrimeGrid?s Extended Sierpinski Problem Prime Search project found the Mega Prime:
193997*2^11452891+1

The prime is 3,447,670 digits long and will enter Chris Caldwell's The Largest Known Primes Database ranked 23th overall. This find eliminates k=193997; 10 k's remain in the Extended Sierpinski Problem.

The discovery was made by Tom Greer (tng*) of the United States using an Intel(R) Xeon(R) E5-2620 v3 CPU @ 2.40GHz with 16GB RAM, running Microsoft Windows 10. This computer took about 3 hours 45 minutes to complete the primality test using multithreaded LLR. Tom is a member of the Sicituradastra. team.

The prime was verified on 4 April 2018, 00:17:20 UTC by Gary Bauer (GDB) of the United States using an Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz with 16GB RAM, running Microsoft Windows 10. This computer took about 2 hours 25 minutes to complete the primality test using multithreaded LLR.

For more details, please see the official announcement.








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2018-04-05: PrimeGrid, ESP(Extended Sierpinski Problem )子项目发现了一个超大质数
2018年4月3日,PrimeGird 的Extended Sierpinski Problem 子项目发现了一个超大质数:
193997*2^11452891+1
该数长度为三百四十四万七千六百七十位,在目前已知质数中排名第二十三。This find eliminates k=193997; 10 k's remain in the Extended Sierpinski Problem.
该数的发现者为来自美国的老铁Tom Greer (tng*),使用的计算机为Intel(R) Xeon(R) E5-2620 v3 CPU @ 2.40GHz with 16GB RAM, running Microsoft Windows 10 。这台计算机用了月3小时45分钟完成了验证。这位发现者是Sicituradastra. team 团队的成员。
*验证信息略
*这个质数是Sierpinski问题的一个解还是什么,我不懂,所以文中关于这个的内容我直接放了原文。

这是@fwjmath 关于Sierpinski Problem 的解释
一个数k如果满足以下性质的话,被称为Sierpinski数:k*2^n+1对于所有n都是合数。

那么,最小的Sierpinski数是多少呢?这是当年的Seventeen Or Bust的项目要做的。


而关于Extended Sierpinski Problem ,项目官网是这样描述的。太专业了不敢贸然翻译,所以贴个原文。
In 1962, John Selfridge discovered the Sierpinski number k = 78557, which is believed to be the smallest such number. The Sierpinski problem attempts to prove that it is, in fact, the smallest Sierpinski number. In 1976, Nathan Mendelsohn determined that the second provable Sierpinski number is the prime k = 271129. The prime Sierpinski problem attempts to prove that this is the smallest prime Sierpinski number.

Should both of these problems be solved, k = 78557 will be established as the smallest Sierpinski number, and k = 271129 will be established as the smallest prime Sierpinski number. However, this would not prove that k = 271129 is the second provable Sierpinski number. Since the prime Sierpinski problem is testing all prime k's for 78557 < k < 271129, all that's needed is to test the composite k's for 78557 < k < 271129. Thus, the extended Sierpinski problem is established.

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发表于 2018-5-7 16:08:34 | 显示全部楼层

2018-05-06: PrimeGrid, Do not use Nvidia driver 397.31

It has come to my attention that Nvidia recently released a new video driver that is causing widespread problems. 397.31 seems to cause the GPU to become inaccessible to both CUDA and OpenCL programs after a while, and can only be reset by rebooting the computer. It's likely this affects all BOINC projects and not just PrimeGrid. Indeed, it probably affects all GPU programs, even those that don't run under BOINC. There's a newer, hotfix driver 397.55 which seems to correct the problem. I strongly recommend either upgrading to 397.55 or rolling back to a driver earlier than 397.31.

More information can be found here.








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2018-05-06: PrimeGrid, 不要使用397.31版本的Nvidia驱动
我注意到最近Nvidia发布了新的显卡驱动,该版本的驱动造成了大面积的问题。397.31版本驱动看起来会导致显卡运行一段时间后无法被CUDA和OpenCL程序访问,并且只能通过重启解决。这一问题有可能会影响到所有BOINC平台上的项目,实际上,这个驱动有可能影响所有GPU程序,就算不是BOINC平台上的分布式计算程序也无法幸免。目前已经放出了397.55的hotfix 驱动,看起来已经修复了此问题。我强烈建议各位,要不升级至397.55,要不就干脆将驱动滚回397.31之前的版本。

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发表于 2018-8-11 16:40:56 | 显示全部楼层
本帖最后由 woclass 于 2018-8-11 17:05 编辑

GFN-262144 Mega Prime!
On 5 June 2018, 05:24:10 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:

5152128^262144+1

The prime is 1,759,508 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 8th for Generalized Fermat primes and 60th overall.

The discovery was made by Rob Gahan (Robish) of Ireland using an NVIDIA GeForce GTX Titan X in an Intel(R) Core(TM) i7-5930K CPU at 3.50GHz with 32GB RAM, running Windows 10 Core Edition. This GPU took about 25 minutes to probable prime (PRP) test with GeneferOCL3. Rob is a member of the Storm team.

The prime was verified on 5 June 2018, 05:43:47 by Aaron Houston Clinton (denim) of the United States using an NVIDIA GeForce GTX 1080 Ti GPU in an Intel(R) Core(TM) i7-6700K CPU at 4.00GHz with 16GB RAM, running Windows 10 Professional Edition. This GPU took about 13 minutes to probable prime (PRP) test with GeneferOCL3. Aaron is a member of the SETI.USA team.

The PRP was confirmed prime by an Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz with 16GB RAM, running Microsoft Windows 10 Professional. This computer took about 7 hours 11 minutes to complete the primality test using LLR.

For more details, please see the official announcement.
6 Jun 2018 | 21:39:58 UTC · 评论



Another GFN-262144 Mega Prime!
On 17 June 2018, 15:40:35 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:

5205422^262144+1

The prime is 1,760,679 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 8th for Generalized Fermat primes and 60th overall.

The discovery was made by Scott Brown (Scott Brown) of the United States using an NVidia GeForce GTX 1080 in an Intel(R) Xeon(R) E5-1650 v3 CPU @ 3.50GHz with 32GB RAM, running Windows 7 Enterprise Edition. This GPU took about 18 minutes to probable prime (PRP) test with GeneferOCL3. Scott is a member of the Aggie The Pew team.

The prime was verified on 17 June 2018, 16:44:04 UTC by Keith Reinhardt (Keith) of Canada using an NVidia GeForce GTX 1050 Ti in an Intel(R) Core(TM) i7-4790 CPU at 3.60GHz with 16GB RAM, running Windows 7 Professional Edition. This GPU took about 43 minutes to probable prime (PRP) test with GeneferOCL5. Keith is a member of the BOINC@Denmark team.

The PRP was confirmed prime by an Intel(R) Xeon(R) E3-1240 v6 CPU @ 3.70GHz with 2GB RAM, running Linux. This computer took about 5 hours 50 minutes to complete the primality test using multithreaded LLR.

For more details, please see the official announcement.
19 Jun 2018 | 15:08:24 UTC · 评论



New SR5 Mega Prime!
On 19 June 2018, 09:48:29 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=327926 by finding the mega prime:

327926*5^2542838-1

The prime is 1,777,374 digits long and will enter Chris Caldwell's The Largest Known Primes Database ranked 60th overall. 71 k's now remain in the Riesel Base 5 Problem.

The discovery was made by Selya Tsuji (stsuji) of Japan using an Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz with 32 GB RAM running Microsoft Windows 10 Professional Edition. This computer took about 39 hours 37 minutes to complete the primality test using LLR. Selya is a member of Team 2ch.

For more details, please see the official announcement.
21 Jun 2018 | 19:03:11 UTC · 评论


Another SR5 Mega Prime!
On 20 June 2018, 06:35:42 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=81556 by finding the mega prime:

81556*5^2539960+1

The prime is 1,775,361 digits long and will enter Chris Caldwell's The Largest Known Primes Database ranked 61st overall. 32 k's now remain in the Sierpinski Base 5 Problem.

The discovery was made by Jiří Bočan (boceli) of the Czech Republic using an Intel(R) Core(TM) i3-6100 CPU @ 3.70GHz with 4 GB RAM running Microsoft Windows 7 Professional Edition. This computer took about 4 hours 23 minutes to complete the primality test using multithreaded LLR. Jiří is a member of the Czech National Team.

The prime was verified on 21 June 2018, 11:41:42 UTC by Wolfgang Schwieger (DeleteNull) of Germany using an Intel(R) Core(TM) i7-7820X CPU @ 3.60GHz with 32 GB RAM running Microsoft Windows 10 Professional Edition. This computer took about 1 hour 11 minutes to complete the primality test using multithreaded LLR. Wolfgang is a member of the SETI.Germany team.

For more details, please see the official announcement.
22 Jun 2018 | 18:40:05 UTC · 评论



Yet Another SR5 Mega Prime!
On 29 July 2018, 11:28:58 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=66916 by finding the mega prime:

66916*5^2628609-1

The prime is 1,837,324 digits long and will enter Chris Caldwell's The Largest Known Primes Database ranked 59th overall and is the largest known base 5 prime. 70 k's now remain in the Riesel Base 5 Problem.

The discovery was made by Honza Cholt (Honza) of the Czech Republic using an Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz with 32 GB RAM running Microsoft Windows 10 Professional Edition. This computer took about 4 hours 35 minutes to complete the primality test using multithreaded LLR. Honza is a member of the Czech National Team.

The prime was verified on 29 July 2018, 15:45:07 UTC by James Krauss (Grebuloner) of the United States using an Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz with 16 GB RAM running Microsoft Windows 10 Professional Edition. This computer took about 5 hours 38 minutes to complete the primality test using multithreaded LLR. James is a member of The Knights Who Say Ni! team.

For more details, please see the official announcement.
1 Aug 2018 | 14:12:44 UTC · 评论




发表于 2018-8-11 16:48:45 | 显示全部楼层
本帖最后由 woclass 于 2018-8-11 16:52 编辑

Solar Eclipse Challenge
August 11th, 2018 a partial solar eclipse will touch many countries in the Northern Hemisphere. We'll be running a Proth Prime Search (LLR) Challenge to celebrate.

The 3 day Challenge starts 10th August, 18:00 UTC and ends 13th August 2018, 18:00 UTC. Work units which are downloaded and completed during the challenge will count towards your challenge score. Many primes are expected to be found.

For more information, questions and friendly banter, please join us in this thread. 10 Aug 2018 | 15:32:30 UTC · 评论



日食挑战
2018-08-10 23:32:30 UTC+8
2018年8月11日,北半球的许多国家将经历一场日偏食。我们将举行一次 Proth Prime Search (LLR) 挑战来庆祝这次日偏食。

挑战时间为:8月11日02:00 UTC+8 ~ 2018年8月14日02:00 UTC+8,一共3天。
在挑战期间下载并完成的工作单元将计入您的挑战得分。我们预计这次挑战会发现许多质数。

想要了解更多信息、提出疑问或友好的玩笑,请看这个帖子
PS: 已经开始了


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发表于 2018-8-12 00:16:52 | 显示全部楼层
2018-08-11: PrimeGrid, GFN-524288 Mega Prime!

On 4 August 2018, 09:10:53 UTC, PrimeGrid?s Generalized Fermat Prime Search found the Generalized Fermat mega prime:

2312092^524288+1

The prime is 3,336,572 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 2nd for Generalized Fermat primes and 24th overall.

The discovery was made by Rob Gahan (Robish) of Ireland using an NVIDIA GeForce GTX 690 in an Intel(R) Core(TM) i7-3930K CPU at 3.20GHz with 12GB RAM, running Windows 10 Professional Edition. This GPU took about 2 hours 36 minutes to probable prime (PRP) test with GeneferOCL5. Rob is a member of the Storm team.

The prime was verified on 4 August 2018, 23:28:14 UTC by Naoaki Tokuda (semanterion) of Japan using an NVIDIA Titan V in an Intel(R) Core(TM) i7-4960X CPU @ 3.60GHz with 64GB RAM, running Windows 7 Ultimate Edition. This GPU took about 24 minutes to probable prime (PRP) test with GeneferOCL5.

The PRP was confirmed prime by an Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz with 16GB RAM, running Microsoft Windows 10 Professional. This computer took about 20 hours 55 minutes to complete the primality test using LLR.

For more details, please see the official announcement.







---------------
2018-08-11: PrimeGrid,发现了目前第二大的广义费马质数
2018年8月4日,PrimeGird 的广义费马质数项目发现了该数:
2312092^524288+1
这个广义费马质数长为三百三十三万六千五百七十二位,为当前已知的第2大广义费马质数,在所有已知质数大小排名中位列第24。
该数的发现者是来自爱尔兰的老铁Rob Gahan (Robish)。使用硬件为:NVIDIA GeForce GTX 690 in an Intel(R) Core(TM) i7-3930K CPU at 3.20GHz with 12GB RAM, running Windows 10 Professional Edition 。这台机器的GPU用了约2小时36分钟完成了该数的PRP检验。Rob是Storm team 的成员。
*验证信息略
发表于 2018-10-22 22:14:04 | 显示全部楼层
注意到项目主页冒出了个万圣节挑战赛的倒计时牌,还有两天开始,有条件的朋友们可以想想办法干他娘的一票
发表于 2018-11-6 09:21:45 | 显示全部楼层
2018-11-05: PrimeGrid, GFN-1048576 Mega Prime!

On 31 October 2018, 00:42:47 UTC, PrimeGrid?s Generalized Fermat Prime Search found the Generalized Fermat mega prime:

1059094^1048576+1

The prime is 6,317,602 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 1st for Generalized Fermat primes and 13th overall. This is the second-largest prime found by PrimeGrid, and the second-largest non-Mersenne prime.

The discovery was made by Rob Gahan (Robish) of Ireland using a Nvidia GeForce GTX 1080 in an Intel(R) Core(TM) i7-7820HK CPU at 2.90GHz with 32GB RAM, running Microsoft Windows 10 Professional Edition. This GPU took about 3 hours 35 minutes to probable prime (PRP) test with GeneferOCL4. Rob is a member of the Storm team.

The PRP was confirmed prime by an Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz with 16GB RAM, running Microsoft Windows 10 Professional Edition. This computer took about 4 days, 5 hours, 54 minutes to complete the primality test using multithreaded LLR.

For more details, please see the official announcement.








------------------
2018-11-05: PrimeGrid, 发现了目前为止最大的广义费马质数!
2018年10月31日00:42:47,我们的广义费马质数搜索项目发现了这个数字:
1059094^1048576+1
这个质数长度为六百三十一万七千六百零二位,是目前已知的最大的广义费马质数,位于已知最大质数排行榜第十三位。这是我们项目找到的所有质数中第二大的数字,也是第二大的非梅森质数。
这个数由来自爱尔兰的老铁Rob Gahan (Robish),使用GTX 1080显卡和i7-7820K CPU发现。显卡花了大约三个半小时对该数进行了PRP验证。Rob是Storm team 的成员。
*验证信息略

点评

我都没注意到。。不愧是欧洲人。。  发表于 2018-11-13 08:43
来自爱尔兰的老铁Rob Gahan (Robish)连着发现两次了啊  发表于 2018-11-11 20:14
那还是GFN-20的,啥时候GFN-21或者GFN-22能出个质数哟  发表于 2018-11-11 08:10
发表于 2019-2-2 18:23:51 | 显示全部楼层
本帖最后由 woclass 于 2019-2-2 18:25 编辑

PrimeGrid: 2019 Tour de Primes Starts February 1st!

Our annual Tour de Primes challenge begins in a little over one day from now, and runs for the entire month of February.
Unlike other challenges, you don't get a trophy just for participating -- you have to actually find primes to win something!
As with last year, we will be awarding special "jersey badges" to the winners in four different categories.
We're also continuing the tradition of offering special badges that are available to anyone who finds an eligible prime!


Come join us in February. More information about Tour de Primes can be foundhere .
2019/1/30 星期三 20:18:34 more



PrimeGrid: 2019 Tour de Primes 将于2月1日开始!


我们一年一度的 Tour de Primes 挑战赛还有一天多就要开始了,比赛将持续到二月份结束。

与其他挑战赛不同的是:只参赛是不能够获得奖杯的——你必须找到真正的素数来得奖!

与去年一样,我们将为四种不同的获奖者颁发特殊的“运动衫奖章/jersey badges”。
我们还将继续保持颁发特殊徽章的传统,只要你找到了合格的素数!


二月份就加入比赛吧。更多关于比赛的信息参见:2019 Tour de Primes
2019/1/30 星期三 20:18:34 more

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发表于 2019-4-13 13:01:47 | 显示全部楼层

2019-03-28: GCW Sieve is shutting down May 1st

This is the official 30 day warning.

On May 1st we will turn off the work generator for the GCW Sieve project. We expect all bases to have reached optimal sieving depth by then.

If you need extra credit for a badge or hours for WUProp, now is the time to get it.

For more information and discussion, please see this forum thread.








============
2019-03-28 GCW Sieve 即将于五月一日关闭
这条信息是官方三十天倒数。
届时我们将停止GCW Sieve项目的任务生成器。
还有牌子没拿到的算友们请抓紧时间肝啦~

发表于 2021-10-2 23:56:40 | 显示全部楼层
321 Mega Prime!

On 6 September 2021, 07:16:28 UTC, PrimeGrid's 321 Search found the Mega Prime:

3*2^17748034-1

The prime is 5,342,692 digits long and enters Chris Caldwell's “The Largest Known Primes Database” ranked 18th overall.

The discovery was made by Marc Wiseler (McDaWisel) of Ireland using an AMD Ryzen 9 5900X 12-Core Processor with 16GB RAM, running Microsoft Windows 10 Professional x64 Edition. This computer took about 2 hours, 45 minutes to complete the primality test using LLR2. Marc Wiseler is a member of the Storm team.

The prime was verified on 6 September 2021, 11:47 UTC, by an Intel(R) Core(TM) i7-9800X CPU @ 3.80GHz with 32GB of RAM, running CentOS. This computer took 2 hours and 41 minutes to complete the primality test using LLR2.
---------------------------------------------
第321个素数

2021 年 9 月 6 日 07:16:28 UTC,PrimeGrid 的Mega Prime搜索找到了第321个素数:

3*2^17748034-1

素数有 5,342,692 位长,进入 Chris Caldwell 的“最大的已知素数数据库”排名第 18 位。

这一发现是由爱尔兰的 Marc Wiseler (McDaWisel) 使用配备 16GB RAM 的 AMD Ryzen 9 5900X 12 核处理器,运行 Microsoft Windows 10 Professional x64 Edition 完成的。 这台计算机用了大约 2 小时 45 分钟完成了使用 LLR2 的素性测试。 Marc Wiseler 是 Storm 团队的成员。

2021 年 9 月 6 日,世界标准时间 11:47,由 Intel(R) Core(TM) i7-9800X CPU @ 3.80GHz 和 32GB RAM,运行 CentOS 验证了素数。 这台计算机用了 2 小时 41 分钟完成了使用 LLR2 的素性测试。
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