Please visit donation page to help the project cover running costs for this month

Toggle Menu

Join PrimeGrid

Returning Participants


Leader Boards



1) Message boards : Number crunching : International Women's Day Challenge (Message 161009)
Posted 23 days ago by numbermaniac
My two primes so far are the same number of digits how odd.
7779439418187*2^1290000-1 (388342 digits)
7825167726087*2^1290000-1 (388342 digits)

I don't get this either - it seems to be what happens

SGS has been at the same number of digits for a really long time. See the list of SGS primes and you'll see how it's pages and pages of exactly 388,342 digits.
2) Message boards : Number crunching : International Women's Day Challenge (Message 161005)
Posted 23 days ago by numbermaniac
The task status page says we've hit 1.47 million SGS tasks per day. I severely underestimated then - my prediction of 50 primes was based on a guess that tasks per day would double from the 400K just before the challenge, to about 800K.

At this rate we could be on track for 100 primes during the challenge.
3) Message boards : Number crunching : International Women's Day Challenge (Message 160977)
Posted 24 days ago by numbermaniac
Recent primes found in the SGS project (these are not Sophie Germain primes) can be seen here:

Does anyone want to give a bet how many such primes we can find in the 24 h challenge window? (Pick some rule for which primes to include, like the task of the 1st-finder should count for the challenge.)


With the current stats we're completing 400K tasks a day and SGS has been finding a prime (on average) once in every 14,432 tasks. That would be about 27 primes in one day already. But that 400K number is slowly increasing as the challenge approaches, so - I'm gonna guess 50 primes.
4) Message boards : Number crunching : Intel ARC GPUs! Apple M1/M2 CPU and GPU!!! (Message 160622)
Posted 41 days ago by numbermaniac
Did some testing earlier and GFN-16 on an M2 MacBook Air's GPU averages about 5 minutes 10 seconds per task. Pretty decent.
5) Message boards : Number crunching : Badges III (Message 159171)
Posted 83 days ago by numbermaniac
6) Message boards : Number crunching : Ideas for 2023 Challenge Lineup? (Message 158681)
Posted 105 days ago by numbermaniac
The PSP challenge being double the length of the ESP challenge seems odd, plus the fact it's the same length as the SoB challenge. Perhaps the PSP challenge should be shortened to 7 days?
7) Message boards : Number crunching : Intel ARC GPUs! Apple M1/M2 CPU and GPU!!! (Message 158384)
Posted 115 days ago by numbermaniac
Out of curiosity, any reason why the ARM Mac GPU app doesn't support GFN-15?
8) Message boards : Wieferich and Wall-Sun-Sun Prime Search : End of WW Project - 30 day notice (Message 157836)
Posted 137 days ago by numbermaniac
Just wondering what the software limit for this search is?


Which means that based on the "min remaining bound" and "leading edge" numbers on the subproject status page, we're currently between 92.3 and 94.5% done with WW.
9) Message boards : Number crunching : Badges III (Message 157741)
Posted 143 days ago by numbermaniac
10) Message boards : Number crunching : Table of prime score for each project (Message 157628)
Posted 150 days ago by numbermaniac
There was some discussion in the Discord server recently about how many prime score points you'd earn if you found a prime in a certain project, such as DYFL, CUL, etc.

I figured I'd make a table with an estimate of the prime score you'd get for finding a prime in any of these projects. These calculations are based on the numbers in the big table on PrimeGrid's front page.

Project | Prime Score GFN-15 | 23.4 SGS | 65.0 PPSE | 156.63 GFN-16 | 178.96 PPS-Mega| 1317.34 GFN-17 | 1408.32 PPS | 1807.78 GFN-18 | 8370.5 SR5 | 30,341 GFN-19 | 56,794 TRP | 95,245 GCW | 238,665 321 | 281,211 WOO | 384,068 GFN-20 | 385,452 ESP | 434,132 CUL | 434,330 PSP | 812,719 SoB | 2,146,006 GFN-21 | 2,665,269 GFN-22 | 16,568,658 DYFL | 22,985,115

Obviously these numbers will slowly increase as the projects continue and the size of the candidates grow larger, but this should give an idea of the number of points you can expect.

Next 10 posts
[Return to PrimeGrid main page]
Copyright © 2005 - 2023 Rytis Slatkevičius (contact) and PrimeGrid community. Server load 1.44, 1.51, 1.63
Generated 1 Apr 2023 | 17:02:42 UTC