20190619, 00:06  #1 
Apr 2019
5×41 Posts 
OBD bookmarks
I am a bit new here, and was interested in the history of this project, so I just got done reading through the Report Results Here thread which contained some useful links hidden in its depths.
Hopefully the forum moderators will update this subforum's main link to a current URL soon as discussed recently in that thread, but I thought it would be helpful to list some of the other related pages here as well: Current OBD tracker run by forums user "James Heinrich" https://www.mersenne.ca/obd Some other stats/graphs provided forums user "lavalamp" http://2721.hddkillers.com/billion/ http://2721.hddkillers.com/graph/ Historical mirror of last scraped (now defunct) original site: http://2721.hddkillers.com/OBDElevenSmooth/ Other higher exponent tracking (for exponents >1G, beyond which is not recorded by GIMPS/Primenet) from James' site: https://www.mersenne.ca/tf1G.php 
20190619, 00:41  #2  
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
29FC_{16} Posts 
Quote:
Hopefully Luigi can post a current link to a working precompiled Factor5 package. Last time I went looking for it. It was something that needed a compiler or was laking a .dll. 

20190619, 00:44  #3  
Apr 2019
CD_{16} Posts 
Quote:
Does that help? 

20190619, 08:37  #4  
Banned
"Luigi"
Aug 2002
Team Italia
12EB_{16} Posts 
Quote:
the header on Factor_5.03 says "5.02", but it is a typo. The source is updated. 

20200823, 16:21  #5 
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
7·983 Posts 
As I understand it, Factor5 is not as fast as Ernst's Mfactor program on the same hardware. And mfaktc or mfakto are much faster on a reasonable gpu (or even somewhat old slow gpu) than either of them on a normal cpu.
Mfaktc can go to almost 2^{32} exponent, 95 bits factor, which seems more than enough for gigadigit candidates currently. Mfakto almost 2^{32} exponent, 92 bits factor, also seems enough. Mfactor compiles in different variants, for speed, depending on available processor type and how much multiple precision may be needed, for very large exponents such as in the middle of https://www.mersenneforum.org/showpo...04&postcount=5 (some 66 to 127 bit exponent examples) More info on software capabilities at the attachment of https://www.mersenneforum.org/showpo...91&postcount=2 Not intending to bash anyone's software or efforts, but there's a reference thread on Factor 5 at https://www.mersenneforum.org/showth...126#post532126 which advises using mfaktx or Mfactor instead for speed & cost when practical. Last fiddled with by kriesel on 20200823 at 17:06 
20200823, 16:37  #6  
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
24774_{8} Posts 
Quote:


20200823, 17:33  #7 
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
1AE1_{16} Posts 
(updated version of my previous post, past the edit expiration time)
As I understand it, Factor5 is not as fast as Ernst's Mfactor program on the same hardware. And mfaktc or mfakto are much faster on a reasonable gpu (or even somewhat old slow gpu) than either of them on a normal cpu. Mfaktc can go to almost 2^{32} exponent (1.29+ gigadigits), 95 bits factor, which seems more than enough for gigadigit candidates currently. Mfakto almost 2^{32} exponent, 92 bits factor, also seems enough. Mfactor compiles in different variants, for speed, depending on available processor type and how much multiple precision may be needed, for very large exponents such as in the middle of https://www.mersenneforum.org/showpo...04&postcount=5 (some 66 to 127 bit exponent examples) or larger; 2, 3,4, n word precision. More info on software capabilities at the attachment of https://www.mersenneforum.org/showpo...91&postcount=2 Not intending to bash anyone's software or efforts, but there's a reference thread on Factor 5 at https://www.mersenneforum.org/showth...126#post532126 which advises using mfaktx or Mfactor instead for speed & cost when practical. Mfaktc RTX 2080 Super experience: (1 of 3 instances running together on different assignments) Code:
[Fri Aug 21 02:25:10 2020] UID: Kriesel/dodortx2080super, no factor for M112062857 from 2^75 to 2^76 [mfaktc 0.21 barrett76_mul32_gs] [Sat Aug 22 15:13:24 2020] UID: Kriesel/dodortx2080super, no factor for M3321933179 from 2^84 to 2^85 [mfaktc 0.21 barrett87_mul32_gs] Last fiddled with by kriesel on 20200823 at 17:37 