20160922, 19:50  #1  
Sep 2016
5_{8} 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
11·419 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
37·131 Posts 

20160923, 20:26  #5  
Sep 2016
5 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}·3·5·59 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_{8} Posts 
Maybe because of the number is too large? It's a 1025 bit number?

20160924, 12:54  #9 
Tribal Bullet
Oct 2004
2·3·19·31 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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