mfaktc: a CUDA program for Mersenne prefactoring - Page 22

ET_ · 2010-05-28, 08:28

Thank you Oliver!

Gotta do some testing this weekend... for M412341233412341

Luigi

P.S. May I ask Kevin for a Windows executable soon?

TheJudger · 2010-05-28, 08:56

Quote:

Originally Posted by ET_

Gotta do some testing this weekend... for M412341233412341

But not with mfaktc. Exponents are still limited to 32 bit. Currently I don't plan to expand this, sorry!

Oliver

ET_ · 2010-05-28, 09:11

Quote:

Originally Posted by TheJudger

But not with mfaktc. Exponents are still limited to 32 bit. Currently I don't plan to expand this, sorry!

Oliver

No problem about it... there is plenty of search space within 32 bits...

Luigi

kjaget · 2010-05-28, 13:29

Quote:

Originally Posted by ET_

Thank you Oliver!

Gotta do some testing this weekend... for M412341233412341

Luigi

P.S. May I ask Kevin for a Windows executable soon?

Yep, I'll work on it tonight EDT. Based on the past few (pre)releases it should work out of the box.

Kevin

ixfd64 · 2010-05-28, 14:54

This could greatly help in finding factors of small double Mersenne numbers.

TheJudger · 2010-05-28, 18:51

A quicky on GTX 480 (Fermi)

Raw GPU (candidates per second (percentage of 71bit kernel)):

Code:

GPU kernel	M66362159	M3321932839
71bit		114.0M		90.5M
75bit		186.7M (164%)	151.4M (167%)
95bit		162.7M (143%)	131.1M (145%)

Definitely faster than I've expected!

Those mul24 hurts Fermi more than expected!
Of course these are preliminary numbers. The new kernel isn't checked well.

Oliver

Uncwilly · 2010-05-28, 20:57

Quote:

Originally Posted by fivemack

76 bits:

kjaget · 2010-05-28, 23:50

OK, windows x64 version here. I did a few quick tests and it seems to be fine but let me know if anyone finds any problems.

The zip file was too large when I included cudart.dll, but it's still available on this thread so grab it from there if you need it (http://www.mersenneforum.org/showpos...&postcount=201).

mfaktc-0.07-win64.zip

henryzz · 2010-06-01, 13:07

Quote:

Originally Posted by kjaget

OK, windows x64 version here. I did a few quick tests and it seems to be fine but let me know if anyone finds any problems.

The zip file was too large when I included cudart.dll, but it's still available on this thread so grab it from there if you need it (http://www.mersenneforum.org/showpos...&postcount=201).

Attachment 5255

Would have fitted if you hadn't included the source. That would be my preference though I don't know about others.

henryzz · 2010-06-01, 14:42

Quote:

Originally Posted by kjaget

OK, windows x64 version here. I did a few quick tests and it seems to be fine but let me know if anyone finds any problems.

The zip file was too large when I included cudart.dll, but it's still available on this thread so grab it from there if you need it (http://www.mersenneforum.org/showpos...&postcount=201).

Attachment 5255

Whats the exponent limit on old cards(8600 GTS)? This binary didn't work with billion digit exponents although it did work with M165150761.

ET_ · 2010-06-01, 15:03

CUDA device info
name: GeForce 9500M GS
compute capabilities: 1.1
maximum threads per block: 512
number of multiprocessors: 4 (32 shader cores)
clock rate: 950MHz

got assignment: exp=3321928097 bit_min=69 bit_max=70

tf(3321928097, 69, 70);
k_min = 88848372480
k_max = 177696745119
class 0: tested 42270720 candidates in 7882ms (5362943/sec) (avg. wait: 163644usec)
avg. wait > 500usec, increasing SievePrimes to 27000

It works fine on Windows 7 64 bits...

Luigi

2010-05-28, 08:28	#232
ET_ Banned "Luigi" Aug 2002 Team Italia 61×79 Posts	Thank you Oliver! Gotta do some testing this weekend... for M412341233412341 Luigi P.S. May I ask Kevin for a Windows executable soon? Last fiddled with by ET_ on 2010-05-28 at 08:49 Reason: Request for Windows exe

2010-05-28, 14:54	#236
ixfd64 Bemusing Prompter "Danny" Dec 2002 California 7⁴ Posts	This could greatly help in finding factors of small double Mersenne numbers. Last fiddled with by ixfd64 on 2010-05-28 at 14:54

2010-05-28, 18:51	#237
TheJudger "Oliver" Mar 2005 Germany 11·101 Posts	A quicky on GTX 480 (Fermi) Raw GPU (candidates per second (percentage of 71bit kernel)): Code: GPU kernel M66362159 M3321932839 71bit 114.0M 90.5M 75bit 186.7M (164%) 151.4M (167%) 95bit 162.7M (143%) 131.1M (145%) Definitely faster than I've expected! Those mul24 hurts Fermi more than expected! Of course these are preliminary numbers. The new kernel isn't checked well. Oliver Last fiddled with by TheJudger on 2010-05-28 at 19:15

2010-06-01, 15:03	#242
ET_ Banned "Luigi" Aug 2002 Team Italia 12D3₁₆ Posts	CUDA device info name: GeForce 9500M GS compute capabilities: 1.1 maximum threads per block: 512 number of multiprocessors: 4 (32 shader cores) clock rate: 950MHz got assignment: exp=3321928097 bit_min=69 bit_max=70 tf(3321928097, 69, 70); k_min = 88848372480 k_max = 177696745119 class 0: tested 42270720 candidates in 7882ms (5362943/sec) (avg. wait: 163644usec) avg. wait > 500usec, increasing SievePrimes to 27000 It works fine on Windows 7 64 bits... Luigi Last fiddled with by ET_ on 2010-06-01 at 15:05

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2010-05-28, 23:50	#239
kjaget Jun 2005 129₁₀ Posts	OK, windows x64 version here. I did a few quick tests and it seems to be fine but let me know if anyone finds any problems. The zip file was too large when I included cudart.dll, but it's still available on this thread so grab it from there if you need it (http://www.mersenneforum.org/showpos...&postcount=201). mfaktc-0.07-win64.zip