20160922, 19:50  #1  
Sep 2016
5_{10} Posts 
Can anyone help me about msieve 1.53 with CUDA?
I tried the precompiled version from network.
Quote:
I tried to compile it with cuda myself. But I don't know how to compile ecm. It miss the gmp.h. Or can anyone please share a precompiled version with me? Thank you so much. 

20160922, 20:25  #2 
"Curtis"
Feb 2005
Riverside, CA
5001_{10} Posts 
it's not the compilation, it's the dll (helper file) you need from CUDA files. Some copies of msieve are zipped with those dll's, others aren't. A google search for that specific dll file (and perhaps a repeat if a later error message asks for a new one) should do the job for you.

20160923, 03:12  #3  
Sep 2016
5_{16} Posts 
Quote:
I download the compiled version from here. But it is with no success. There's sort_engine_sm20.dll and stage1_core_sm20.ptx. And I place a cudart64_55.dll in it. It doesn't report that error now. But it crashes. Could you please give me a working one? Thank you so much. Last fiddled with by Seto on 20160923 at 03:26 

20160923, 05:55  #4 
"Carlos Pinho"
Oct 2011
Milton Keynes, UK
3×1,657 Posts 

20160923, 20:26  #5  
Sep 2016
5_{10} Posts 
Quote:
But when I try to refactoring the number below . It is changed. 309 digits become 308 digits. But another 309 digits is ok. original 263209838529653741309366162078767955401650210060093940479440536241110980313794956537153327107041219371342779419863684554849202277263853757273750327567871802106538309185809561001712198328099404198770096988081455939118836298393133358550417396551205893870871649995935725104508543665608276612812277299875371100701 changed Sat Sep 24 04:22:53 2016 factoring 83440525043422150536435642999865482039852512165863283206010455083378304508293993404444849784633683350222665539992291197190412508449437134780902896928397677728770415760944075725409978726853310079317014035996450170280685616050670477076504286010378656707521139311349426864561297727128560307976920970251146963485 (308 digits) another 309 digits OK 118393457429966445423507908491531402270337754158882484675748105934148846524056619706311661917410487644299844878332906894614644688640160609665064262216677430298946939779894734468229486527102847923162321052481696280953569396894564473594046393586443528941960719601633381910534441944880914440596803530540949102921 Last fiddled with by Seto on 20160923 at 20:30 

20160923, 20:50  #6  
"Ed Hall"
Dec 2009
Adirondack Mtns
2·2,011 Posts 
Quote:
Last fiddled with by EdH on 20160923 at 20:51 

20160924, 03:01  #7 
Sep 2016
5 Posts 
If 3 is the factor of it, I think the number should begin with 877. But instead, it doesn't.
Last fiddled with by Seto on 20160924 at 03:01 
20160924, 10:03  #8 
Sep 2016
5 Posts 
Maybe because of the number is too large? It's a 1025 bit number?

20160924, 12:54  #9 
Tribal Bullet
Oct 2004
3·1,181 Posts 
Current versions have a 1024bit limit on the input size. The limit is easy to increase, but I don't do that because then people will think Msieve can factor 1024bit RSA keys. An intelligence agency probably can, but we definitely cannot.

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