20200415, 08:59  #23 
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
11^{2}×61 Posts 

20200415, 09:08  #24  
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
1CD5_{16} Posts 
Quote:
Presumably this has the same 32bit exponent limit as mfaktc. If you have any plans to take that higher, a 67bit limit would be useful for a couple of exponents I've been trying to factor lately. (I'm currently using Mfactor for those. Mmff is not suitable for them since they are not doublemersennes.) Since there would be a performance hit, it's probably best to keep the 32bitexponent version available. Last fiddled with by kriesel on 20200415 at 09:17 

20200920, 20:13  #25 
Mar 2011
Germany
61_{16} Posts 
Good news, finally I was able to implement negative bases.
Also the problem with the 1660 card should be fixed now. I attached the source code and 64 bit binaries for Linux and Windows. As usual test first if all tests are running successfully with Code:
./grmfaktc.exe st Code:
Selftest statistics number of tests 49113 successfull tests 49113 kernel  success  fail ++ UNKNOWN kernel  0  0 64bit_mul32  8631  0 75bit_mul32  9710  0 95bit_mul32  9915  0 64bit_mul32_gs  6188  0 75bit_mul32_gs  7246  0 95bit_mul32_gs  7423  0 selftest PASSED! Code:
./grmfaktc.exe tf 97 4956227 1 64 Code:
Factor=4763923,60,61 Factor=base=127,1055167,1,64 Factor=base=97,1055167,1,64 Factor=base=17,1055167,1,64 Factor=base=10,1055167,1,64 Factor=4763923,60,61 Some additional notes: I wrote a Mathematica notebook that allows to calculate the allowed remainders for any base. The script's source code can be extracted from the file allowedremaindersdata.c I give some results here: Code:
base > {{<remainder list>}, <modulo value>}  13 > {{1, 7, 9, 11, 15, 17, 19, 25, 29, 31, 47, 49}, 52} 12 > {{1, 7, 13, 19}, 24}} 11 > {{1, 3, 5, 9, 15, 23, 25, 27, 31, 37}, 44} 10 > {{1, 7, 9, 11, 13, 19, 23, 37}, 40} 2 > {{1, 3}, 8} 2 > {{1, 7}, 8} 10 > {{1, 3, 9, 13, 27, 31, 37, 39}, 40} 11 > {{1, 5, 7, 9, 19, 25, 35, 37, 39, 43}, 44} 12 > {{1, 11, 13, 23}, 24} 13 > {{1, 3, 4, 9, 10, 12}, 13} Have fun. Cheers, Danilo Last fiddled with by MrRepunit on 20200920 at 20:15 
20201109, 08:44  #26 
Nov 2020
Russia
2_{16} Posts 
I found some problem.
In the result grmfaktc 0.21 I get factor. When I run mprime 30.3 I don't get factor. Sample: grmfacktc 0.21 Code:
R[10]211584161 has a factor: 11109304798164647139787 [TF:73:74:mfaktc 0.21 75bit_mul32_gs] found 1 factor for R[10]211584161 from 2^73 to 2^74 [mfaktc 0.21 75bit_mul32_gs] Code:
M211584161 no factor from 2^73 to 2^74, Wh8: bla, AID: bla Error in the grmfaktc or maybe the settings need to be changed? 
20201110, 08:17  #27  
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
23515_{8} Posts 
Quote:
R_{10}211584161 is a shorthand for (10^2115841611)/9. That's 211584161 "ones" in decimal notation. M211584161 is a shorthand for 2^2115841611. That's 211584161 "ones" in binary notation (and a much smaller number). Two different numbers. One has a factor and the other does not. You can test, using Pari/GP. F=11109304798164647139787; print(Mod(10,F)^2115841611) Download gp, start gp, run these two lines. The result indeed confirms that it = 0, ergo F does divide R_{10}211584161 

20201110, 09:48  #28 
Nov 2020
Russia
2_{16} Posts 
Thank you, it worked
I changed the line with the assignment in worktodo.txt to Code:
Factor=bla,base=2,211584161,71,72 
20201110, 23:57  #29 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
10,061 Posts 
Then you turned it into mfaktc (which is its parent program).
Trouble is that more universal programs need extra registers to hold variables (that are in the stricter program a constant), and the class selection/enumeration code is probably more involved than in its parent mfaktc. Are the registers going to be used better or worse when you are compiling a program that does more? Have you run timing tests? So it is unclear if this is simply slower than to run strict mfaktc (where base=2 as a constant throughout the code, by definition). 
20201111, 07:33  #30  
Bemusing Prompter
"Danny"
Dec 2002
California
100110111111_{2} Posts 
Quote:
Last fiddled with by ixfd64 on 20201111 at 22:02 

20201111, 14:36  #31  
"James Heinrich"
May 2004
exNorthern Ontario
5×821 Posts 
Quote:


20201111, 19:36  #32  
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
11^{2}×61 Posts 
Quote:
Last fiddled with by kriesel on 20201111 at 19:36 

20201111, 19:56  #33  
"James Heinrich"
May 2004
exNorthern Ontario
5×821 Posts 
Quote:


Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
mfaktc: a CUDA program for Mersenne prefactoring  TheJudger  GPU Computing  3622  20230125 16:41 
mfakto: an OpenCL program for Mersenne prefactoring  Bdot  GPU Computing  1719  20230116 15:51 
The P1 factoring CUDA program  firejuggler  GPU Computing  753  20201212 18:07 
World's seconddumbest CUDA program  fivemack  Programming  112  20150212 22:51 
World's dumbest CUDA program?  xilman  Programming  1  20091116 10:26 