20131103, 02:13  #1  
Sep 2013
41 Posts 
how to get cudaLucas work for large exponent?
For example, I had a few jobs which are large exponents, such as 444xxxxxx from 78bit.
If I use fft length automatically from the option Quote:
Quote:


20131105, 20:41  #2 
"Carl Darby"
Oct 2012
Spring Mountains, Nevada
3^{2}·5·7 Posts 
Try using Threads=512 in the ini file.

20131105, 21:57  #3 
Sep 2013
41 Posts 

20131121, 17:27  #4  
"Rob Gahan"
Aug 2013
Ireland
2^{2}·3^{2} Posts 
Quote:
However my exponents are smaller than yours so f may need to increase, 20971520 = 1024 * 20480. So multiples of 1024. I dont fully understand it, but I would try 1024 * 3072 = 31457280 if 20971520 doesnt work. LaurV explained it but I never got a chance to study it yet. http://www.mersenneforum.org/showpos...&postcount=236 Hope this helps Cheers Rob. 

20131121, 17:32  #5  
"Rob Gahan"
Aug 2013
Ireland
2^{2}·3^{2} Posts 
Quote:
Be warned, Im using GTX690's and 332xxxxxx takes 4500 hours or 190 days to run, hope your not in a hurry, :P 

20131122, 10:33  #6 
"Svein Johansen"
May 2013
Norway
3·67 Posts 

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