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2013-06-20, 14:10   #287
Puzzle-Peter

Jun 2009

2BC16 Posts

Quote:
 Originally Posted by MyDogBuster 90*748^116015+1 is prime
Well done! I wanna be next, there's been enough of a dry spell if you ask me...

 2013-07-01, 13:30 #288 Cruelty     May 2005 22·11·37 Posts 7019*10^881309-1 (881313 digits)
2013-07-01, 14:26   #289
MyDogBuster

May 2008
Wilmington, DE

285210 Posts

Quote:
 7019*10^881309-1 (881313 digits)
Nice one Borys - 93 on the big list

CRUS's largest to date and R10 is now a 1ker

Last fiddled with by MyDogBuster on 2013-07-01 at 14:27

 2013-07-01, 14:28 #290 Cruelty     May 2005 22×11×37 Posts Thanks, still one remaining for R10 and another one for S10
 2013-07-01, 14:32 #291 Puzzle-Peter     Jun 2009 22×52×7 Posts Good one! Stamina pays off in the long run...
2013-07-01, 16:45   #292
rogue

"Mark"
Apr 2003
Between here and the

5×372 Posts

Quote:
 Originally Posted by Cruelty 7019*10^881309-1 (881313 digits)
Awesome!

 2013-07-01, 18:30 #293 henryzz Just call me Henry     "David" Sep 2007 Liverpool (GMT/BST) 27·47 Posts The depressing part is that I calculate only 19.56% chance of a prime by n=2M for r10.
 2013-07-01, 19:06 #294 Cruelty     May 2005 110010111002 Posts What is really needed is a fixed-k non-base-2 GPU sieve similar to srsieve
 2013-07-01, 20:12 #295 Siemelink     Jan 2006 Hungary 26810 Posts An excellent reward for three years of persistence. 8579*10^373260-1 seems to have been your previous R10 prime... Willem.
2013-07-01, 21:01   #296
rogue

"Mark"
Apr 2003
Between here and the

152758 Posts

Quote:
 Originally Posted by Cruelty What is really needed is a fixed-k non-base-2 GPU sieve similar to srsieve
Unfortunately we are a way from doing that. BSGS needs too much memory so the GPU is not practical. Memory light methods are not very smooth.

2013-07-01, 22:28   #297
henryzz
Just call me Henry

"David"
Sep 2007
Liverpool (GMT/BST)

27·47 Posts

Quote:
 Originally Posted by rogue Unfortunately we are a way from doing that. BSGS needs too much memory so the GPU is not practical. Memory light methods are not very smooth.
This has been discussed in the past.
http://www.mersenneforum.org/showthr...ht=bsgs&page=3
Is the memory usage dependent on p or the range of p?
Also you talk about needing 256 sets of 80MB data as there are 256 cores. Is there a way to utilize multiple cores on the same set of data?
Another option is to make it use only a few cores(as many as possible) and expect the user to also run a thread of mfaktc to saturate the gpu.

Last fiddled with by henryzz on 2013-07-01 at 22:33

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