mersenneforum.org Search Results
 Register FAQ Search Today's Posts Mark Forums Read

 Showing results 1 to 25 of 1000 Search took 0.41 seconds. Search: Posts Made By: paulunderwood
 Forum: Homework Help 2020-05-25, 10:49 Replies: 36 Views: 89,836 Posted By paulunderwood Do you mean $$\exists$$ and $$\Sigma$$ and... Do you mean $$\exists$$ and $$\Sigma$$ and $$\in$$?
 Forum: Miscellaneous Math 2020-05-23, 18:38 Replies: 18 Views: 624 Posted By paulunderwood Is it 3 mod 4? How many tons of coal are... Is it 3 mod 4? How many tons of coal are needed to LL test it? What do you calculate the "chance" of being prime is? Let me give you an example prime p=2^82589933-1 definitely has no small...
 Forum: Miscellaneous Math 2020-05-23, 14:15 Replies: 18 Views: 624 Posted By paulunderwood The "8" --> "10" in the exponent would be beyond... The "8" --> "10" in the exponent would be beyond expectation. It would take a day on a GPU you to dismiss this claim, assuming P-1 does not turn up a factor.
 Forum: Programming 2020-05-22, 21:09 Replies: 5 Views: 256 Posted By paulunderwood We need to put it to the test with a... We need to put it to the test with a (b^n-1)/(b-1) number of considerable size not necessarily prime. ./llr64 -q"(10^49081-1)/9" -t4 Invalid expression in command line. ./pfgw64...
 Forum: GPU Computing 2020-05-18, 22:40 Replies: 267 Views: 12,886 Posted By paulunderwood Congrats on getting you 3-GPU rig running. With... Congrats on getting you 3-GPU rig running. With the one on your Haswell that is equivalent to ~40x 4 core CPUs but far more efficient in power usage and overall size. Now you should soon be propelled...
 Forum: Linux 2020-05-15, 03:40 Replies: 5 Views: 336 Posted By paulunderwood I had a "crazy" network recently. It turned out... I had a "crazy" network recently. It turned out to be a half-in LAN cable on one of the machines on my network.
 Forum: GPU Computing 2020-05-15, 00:29 Replies: 267 Views: 12,886 Posted By paulunderwood Does id say you are in the video group? If not do... Does id say you are in the video group? If not do sudo usermod -aG video emayer (if that is your username) and logout and back in and run id again to see.
 Forum: GPU Computing 2020-05-14, 20:53 Replies: 267 Views: 12,886 Posted By paulunderwood :davar55: I run gpuowl as root on Buster;... :davar55: I run gpuowl as root on Buster; Everything else as a user, apart from admin stuff :wink:
 Forum: GPU Computing 2020-05-14, 20:02 Replies: 267 Views: 12,886 Posted By paulunderwood It's ugly, but see here... It's ugly, but see here (https://mersenneforum.org/showthread.php?t=25065&highlight=sudo&page=2) on how to run without sudo.
 Forum: GPU Computing 2020-05-14, 19:42 Replies: 267 Views: 12,886 Posted By paulunderwood Don't you need to prefix with a sudo command? Don't you need to prefix with a sudo command?
 Forum: GPU Computing 2020-05-14, 19:26 Replies: 267 Views: 12,886 Posted By paulunderwood What does uname -a give? Are you using rocm v3.3?... What does uname -a give? Are you using rocm v3.3? What command are you issuing to try and run gpuowl?
 Forum: GPU Computing 2020-05-13, 22:00 Replies: 267 Views: 12,886 Posted By paulunderwood 2. I am glad you got the rig working with one... 2. I am glad you got the rig working with one card. Measure the wall wattage carefully at --setsclk 3. When you install all three GPUs you want to stay in safe limits, otherwise things will fry! Have...
 Forum: Miscellaneous Math 2020-05-13, 18:03 Replies: 16 Views: 335 Posted By paulunderwood If you taking about how long it takes to wrtie... If you taking about how long it takes to wrtie the number to file: The following takes ~1 ms with Pari/GP (https://pari.math.u-bordeaux.fr/download.html): ...
 Forum: Programming 2020-05-13, 17:51 Replies: 5 Views: 256 Posted By paulunderwood You need to generate a list to input to LLR. ... You need to generate a list to input to LLR. Why bother? PFGW is much better at this sort of thing. More from the documentation:
 Forum: Programming 2020-05-13, 17:38 Replies: 5 Views: 256 Posted By paulunderwood Run it through PFGW downloaded from sourceforge... Run it through PFGW downloaded from sourceforge and use the -f switch for trial factoring if necessary. From pfgwdoc.txt:
 Forum: Prime Wiki 2020-05-13, 16:49 Replies: 161 Sticky: Prime-Wiki Views: 10,672 Posted By paulunderwood This is a list of the top20s... This is a list of the top20s (https://primes.utm.edu/top20/index.php). This gives the thresholds (https://primes.utm.edu/top20/sizes.php).
 Forum: Miscellaneous Math 2020-05-13, 14:29 Replies: 16 Views: 335 Posted By paulunderwood Just to expand on your "in almost very case".... Just to expand on your "in almost very case". PRP'ing a huge partitions number is quicker than computing its decimal digits (with the latest Pari/GP version). Proving it prime or even checking the...
 Forum: GPU Computing 2020-05-13, 03:34 Replies: 267 Views: 12,886 Posted By paulunderwood On my Debian system which is similar to Ubuntu: ... On my Debian system which is similar to Ubuntu: apt-cache search libOpenCL ocl-icd-libopencl1 - Generic OpenCL ICD Loader nvidia-libopencl1 - NVIDIA OpenCL ICD Loader library...
 Forum: GPU Computing 2020-05-13, 03:22 Replies: 267 Views: 12,886 Posted By paulunderwood @ernst, I am glad your found the source of the... @ernst, I am glad your found the source of the hardware problem albeit frustrating, especially when you could have double checked the vga-hdmi gadget before you bought the Celeron system. We have all...
 Forum: Miscellaneous Math 2020-05-12, 05:35 Replies: 79 Views: 4,903 Posted By paulunderwood Another idea {forprime(p=3,30000000000,if( Mod(Mod(1,p+17)*x+2,x^2-3)^lift(Mod(2,p+1)^p)==1&& Mod(Mod(1,p+257)*x+2,x^2-3)^lift(Mod(2,p+1)^p)==1&& Mod(Mod(1,p+65537)*x+2,x^2-3)^lift(Mod(2,p+1)^p)==1,...
 Forum: Software 2020-05-12, 05:09 Replies: 4 Views: 176 Posted By paulunderwood A 3990x will necessary to certify R49081... A 3990x will necessary to certify R49081 (http://www.elektrosoft.it/matematica/repunit/R49081-4.pdf) in a timely manner when Marcel upgrades Primo. As for my Opteron System: It stopped working and...
 Forum: Software 2020-05-11, 09:07 Replies: 4 Views: 176 Posted By paulunderwood ECPP is O(ln(n)^(4+eps)) meaning a doubling in... ECPP is O(ln(n)^(4+eps)) meaning a doubling in length takes 16 times as long. This can be helped by having a many-core system. It took me 21.5 months to certify a 40000 digit number on a 48 core...
 Forum: GPU Computing 2020-05-07, 18:35 Replies: 2,234 Views: 116,319 Posted By paulunderwood Yes, I meant µs. But how do I generate mu with... Yes, I meant µs. But how do I generate mu with the keyboard easily? nvm: I found this on how to do it Gnome (https://www.maketecheasier.com/quickly-type-special-characters-linux/) without having...
 Forum: GPU Computing 2020-05-07, 05:49 Replies: 2,234 Views: 116,319 Posted By paulunderwood Was ~1200us/it (103.9M) and ~1800us/it (104.9M). ... Was ~1200us/it (103.9M) and ~1800us/it (104.9M). Now 1440us/it each -- both at 104.9M.
 Forum: Hardware 2020-05-06, 20:36 Replies: 21 Views: 666 Posted By paulunderwood I know. Taking electricity costs into account is... I know. Taking electricity costs into account is a must. One could replace the components of some older boxen, Keeping the box, PSU, mains cable, graphics and disk, and replace the CPU, board and...
 Showing results 1 to 25 of 1000

All times are UTC. The time now is 02:14.

Tue May 26 02:14:05 UTC 2020 up 61 days, 23:47, 1 user, load averages: 1.88, 1.91, 2.16