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 RogerVolunteer developer
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Primorial - George Boole Bicentenary Challenge - 14-28th August 2015
Announced is a two week Primorial challenge from the 14th until the 28th of August. I suggest we start at 12:00 UTC and end at 12:00 UTC.
Boole is a pivotal figure who can be described as the ‘father of the information age’. His invention of Boolean algebra and symbolic logic pioneered a new mathematics. His legacy surrounds us everywhere, in the computers, information storage and retrieval, electronic circuits and controls that support life, learning and communications in the 21st century. In 2015, University College Cork celebrates the bicentenary of George Boole, 1815-64.
George Boole Mathematical Sciences Conference 17 Aug 2015 - 28 Aug 2015
http://georgeboole.com/events/conferences/george-boole-mathematical-sciences-conference.html
The largest known Primorial prime is 1098133# - 1 found in March 2012 by James P. Burt, a Primegrid searcher who's, "Looking for Primes :)". Leading edge of the Primorial prime search now up to 1,961,221 on both the plus and minus side.
More about the Primorial prime search can be found here. News and infos about the PRPNet client can be found here.
To take part, you have to activate the following lines in prpclient.ini:
server=PRS:100:1:prpnet.primegrid.com:12008
Remember you also need to run the "install", "update" and "start" batch file for the appropriate number of cores on your PC. Give it a go before the challenge to iron out any problems.
Stats will be available 15 minutes after the start at the well known place here.
All previous PRPNet challenge stats can be found here.
Good luck!
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How do I activate to start the challenge(when it is time to start)? |
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What is the executable for PRS? LLR or pfgw?
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676754^262144+1 is prime |
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Not sure, but it seems to be running a test. |
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All cpu's and gpu stopped running. |
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JimB Honorary cruncher
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Primorial uses PFGW. LLR cannot handle primorial. |
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Is that something that can be changed? |
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So, if I understand correctly I cannot crunch PRPNet client? I think I did follow the "Dummy" steps, but I guess no go? |
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Hello,
Is it better to have 8 cores crunching 1 WU or 8 cores / 8 WU's ?
If yes, can you explain me how to have 8 cores / 1 WU only ?
Thank You
If I understand correctly the stats, one was allowed to start before today 2:00 PM,
not like "usual" PG challenges ?
Finally, what is the average running time of 1 WU ?
Thank You
Best Regards
Philippe |
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HonzaVolunteer moderator
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Hi Philippe,
each prime test needs to be run on a core so you need to run several instances.
PRPNet is designed to help you with that up to 16 cores.
For the third question - what CPU?
Perhaps it is better that you run a test yourself on your host and see how it's going.
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My stats
Badge score: 1*1 + 5*1 + 8*3 + 9*11 + 10*1 + 11*1 + 12*3 = 186 |
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Sysadm@NbgVolunteer moderator
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If I understand correctly the stats, one was allowed to start before today 2:00 PM,
not like "usual" PG challenges ?
Yes!
We got two early birds this challenge: Lumiukko & JeppeSN
Congratulation
on my i7 2600K a workunits runs ~ 6,5 hours, on my Q9550 ~12,5 hours
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Sysadm@Nbg
my current lucky number: 113856050^65536 + 1
PSA-PRPNet-Stats-URL: http://u-g-f.de/PRPNet/
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Hello !
Thank you for your answers.
My CPU's = i7 4770K @ 3.9 Ghz / i7 4700HQ @ 3.17 Ghz
Both HT ON
It looks like it will take about 20 hours per WU ... ?
Wait and see :) |
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Hello Again,
Sorry to bother you, but is there a way to improve a little the WU's running time ?
Even HT OFF, it tooks 18 hours to complete on my i7 4770K, and about 19 hours on
i7 4700HQ HT ON ...
Is there a setting I can amend as for the GPU WU's ?
NB @Sysadm@Nbg : My running time look really far too long when compared to yours ?
NB2 using pfgwexe, not llr.
Thank You
Have a nice week end
Philippe |
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HonzaVolunteer moderator
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Run no more instances than physical cores or try to leave one core idle.
Turn HT off - it may help for sieving but doesn't (or even hurt) for prime testing.
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My stats
Badge score: 1*1 + 5*1 + 8*3 + 9*11 + 10*1 + 11*1 + 12*3 = 186 |
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Of course, set your .ini files to point to the 64-bit version of PFGW. /JeppeSN |
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Thank you for your responses.
I ran : pfgwexe=pfgw64.exe, but it took really too long (as far as I understand) to complete the WU's.
18 hours HT OFF on an i7 4770K / WC AIO running @ 3.9 Ghz / Temp 49° C ...
Maybe I did something wrong :/
Thank You for your help.
Best Regards
Philippe
EDIT : I'll try 6 WU's on the 4770K, HT ON, @4.3 Ghz, running pfgwexe=pfgw64.exe (= for 64 bits OS, right ?)
Best,
Phil |
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JimBHonorary cruncher
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EDIT : I'll try 6 WU's on the 4770K, HT ON, @4.3 Ghz, running pfgwexe=pfgw64.exe (= for 64 bits OS, right ?)
You only have 4 physical cores and should not be running more than 4 WUs at a time (assuming HT is off). HT on makes these jobs take more than twice as long. |
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I know ...
But look at the previous posts :/
It tooks 18 hours to complete 4 WU's, HT OFF.
I prefer to quit rather to bother people with running times.
Thank You
Best Regards
Philippe
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...It tooks 18 hours to complete 4 WU's, HT OFF...
Hi,
I'm using a i5 3570K and my WUs are taking circa 4 hours 45 mins each
As our esteemed friend JeppeSN mentioned, double check that you have changed the prpclient.ini so that pfgwexe=pfgw64.exe
Best of luck,
Pete
[2015-08-15 17:22:54 GST] PRS: Getting work from server prpnet.primegrid.com at port 12008
[2015-08-15 17:22:56 GST] PRS: PRPNet server is version 5.4.0
Primorial Prime Search
1969831#+1 is composite: RES64: [DF7218A811AA8BCB] (17088.8442s+7.5439s)
[2015-08-15 22:07:52 GST] PRS: 1969831#+1 is not prime. Residue DF7218A811AA8BCB
[2015-08-15 22:07:52 GST] Total Time: 13:11:34 Total Work Units: 3 Special Results Found: 0 |
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This would only occur to TheDawgz, but ...
You are running 4 seperate PRPNet clients out of 4 seperate directories; NOT just specifing 4 work units on the server line???
ie: NOT server=PRS:100:4:prpnet.primegrid.com:12008
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There's someone in our head but it's not us. |
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Michael GoetzVolunteer moderator
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18 hours...
I looked at your results.
You are in fact using pfgw64 (the correct program).
Your earlier tests took about 12 hours. Your most recent tests took 18 hours. My guess is you had hyperthreading turned off for the 12 hour tasks, that is, you were running 4 of fewer tests.
The 18 hour tasks are likely the result of running more than 4 tasks at once. (I can see that at one point you seemed to be running 8 simultaneously, which will slow down the tests significantly.)
Don't run more than 4 at once.
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My lucky number is 75898524288+1 |
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Thank you for your help.
I am currently running a "test".
4770K HT OFF / turbo speed 3.9 Ghz / Temp 50 ° C / 24 Go RAM @ 1600 / Z87 PRO / WC AIO
Running only 1 single WU (=> 1 core only) looks very fast. (less than 4 hours)
Running 2 WU / 2 cores looks ... fast also (less than 4 hours)
What I don't understand is why running 1 instance of "4-quad-start-prpclient" is slowing down so much the cpu performance ... (it needs at least 12/14 hours to run 4 WU's at a time, 1 per core)
Running 1 WU on 1 CORE or 4 WU's on 1 core each = 4 cores should not (as far as I understand ?) increase the calculation time by 400 % ...
Something not logical I cannot understand.
CPU load running 1 WU = between 25 % and 27 %
CPU load running 2 WU = between 49 % and 55 %
NB Can it be a RAM problem ? I see it uses 3.25 GO when 1 wu running, but same 3.25 GO when 4 wu's running ?
NB2 Have set the Priority to 1 = Normal
Thank You
Best Regards
Phil1966 |
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GDBSend message
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Probably used up all your L2 cache running more than 2 instances. Going to main mem is at least 10 times slower than using L2 cache. |
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Thank You.
Will let PRPNet running 2 WU's Only.
Looks fine :)
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RogerVolunteer developer
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Almost 3.5 days into the Challenge. Leading edge now past 1,983,300. Well on the way to crack 2M.
unconnected for team Russia well in front on the Challenge standings.
No unreported primes as yet. |
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RogerVolunteer developer
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Primorial prime search leading edge has now passed 2 Million!
To give you some perspective Primegrid is sieving Primorial to 10 Million. So way to go yet. |
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RogerVolunteer developer
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3.5 days left of the challenge.
unconnected still the leading User
Leader of the Team Challenge now Aggie_The_Pew
PRS leading edge now at 2,042,000#
Using the formula for number of expected primes A to B = e^γ (ln(B) – ln(A))
Where γ is the Euler–Mascheroni constant = 0.577215664901533...
Chance of prime find 1,961,321 to 2,042,000 = e^γ * (ln(2,042,000) - ln(1,961,321)) = 0.07179768...
i.e. 7.18% chance on both the plus and minus sides.
Or a 1 in 7.2 chance we would have found at least one prime in the Challenge so far. |
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Sysadm@NbgVolunteer moderator
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thanks for the nice race
stats are saved here
Congratulation to unconnected and Aggie_The_Pew
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Sysadm@Nbg
my current lucky number: 113856050^65536 + 1
PSA-PRPNet-Stats-URL: http://u-g-f.de/PRPNet/
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RogerVolunteer developer
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Challenge Stats are final. Congratulation to unconnected and Aggie_The_Pew!
The top of the challenge rankings is as follows:
top users
1 unconnected 13,418,584
2 zunewantan 10,408,883
3 hiroaki 5,430,875
4 Grebuloner 5,231,542
5 brinktastee 3,221,147
top teams
1 Aggie_The_Pew 17,079,361
2 Russia 13,418,584
3 Team_JPN 5,430,875
4 The_Knights_Who_Say_Ni! 5,246,150
5 PrimeSearchTeam 2,734,838
Collectively we've done 6,973 WUs, had 34 competitors from 21 Teams and advanced the Primorial leading edge past 2,072,801.
Chance of prime find 1,961,321 to 2,072,801 = 9.85% chance on both the plus and minus sides.
Or a 1 in 5.3 chance of having found at least one prime during the Challenge. Unfortunately no prime was found.
Primorial sieving has really taken off lately with the massively upgraded and improved system. Currently sieved to 8256G.
More sieving means we have less candidates to search to find the same number of primes, give it a go!
Remember to make a suggestion at the 2015 PRPNet Challenges - Discussion and Dates thread.
See you at the next challenge!
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Primorial sieving has really taken off lately with the massively upgraded and improved system. Currently sieved to 8256G.
More sieving means we have less candidates to search to find the same number of primes, give it a go!
It's true, it really taken off, but the payment is not quite rewarding. After all, it's a manual sieving, and we collect less credit than trp/esp sieve. |
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