mersenneforum.org  

Go Back   mersenneforum.org > Factoring Projects > Msieve

Reply
 
Thread Tools
Old 2014-02-12, 18:49   #1
Mini-Geek
Account Deleted
 
Mini-Geek's Avatar
 
"Tim Sorbera"
Aug 2006
San Antonio, TX USA

17·251 Posts
Default lanczos error: submatrix is not invertible

I'm trying to postprocess GC_6_302 using Brian Gladman's 1.52dev SVN 942 Windows build. I get this error when the Lanczos begins:
Code:
Wed Feb 12 12:07:54 2014  commencing Lanczos iteration (4 threads)
Wed Feb 12 12:07:54 2014  memory use: 3067.7 MB
Wed Feb 12 12:08:22 2014  lanczos error: submatrix is not invertible
Wed Feb 12 12:08:22 2014  lanczos halted after 4 iterations (dim = 191)
Wed Feb 12 12:08:22 2014  linear algebra failed; retrying...
Wed Feb 12 12:08:22 2014  commencing Lanczos iteration (4 threads)
Wed Feb 12 12:08:22 2014  memory use: 3067.7 MB
Wed Feb 12 12:08:33 2014  lanczos error: submatrix is not invertible
Wed Feb 12 12:08:33 2014  lanczos halted after 1 iterations (dim = 0)
Wed Feb 12 12:08:33 2014  linear algebra failed; retrying...
I've heard that there is a newer build of msieve, about SVN 956, but I don't know of any 64-bit Windows builds of it available. I didn't specify a target_density for this attempt.
Does this build have problems post-processing, or is there something else wrong?
Attached Files
File Type: zip msieve.log.zip (21.3 KB, 87 views)

Last fiddled with by Mini-Geek on 2014-02-12 at 18:59
Mini-Geek is online now   Reply With Quote
Old 2014-02-12, 22:54   #2
fivemack
(loop (#_fork))
 
fivemack's Avatar
 
Feb 2006
Cambridge, England

143578 Posts
Default

Yes, I think 942 is a version which has the memory-corruption bug, whose symptoms include that message.

Last fiddled with by fivemack on 2014-02-12 at 22:54
fivemack is offline   Reply With Quote
Old 2014-02-12, 22:56   #3
wombatman
I moo ablest echo power!
 
wombatman's Avatar
 
May 2013

1,741 Posts
Default

You can try this one if you like. I use it without issue. You may need a pthread dll, but you should be able to find that no problem.

Edit: Note that this one does NOT have CUDA enabled. I use it just for the linear algebra.
Attached Files
File Type: zip msieve-x64-svn946.zip (482.8 KB, 123 views)

Last fiddled with by wombatman on 2014-02-12 at 22:58
wombatman is offline   Reply With Quote
Old 2014-02-13, 00:34   #4
VBCurtis
 
VBCurtis's Avatar
 
"Curtis"
Feb 2005
Riverside, CA

2·2,339 Posts
Default

I have been using the windows 1.52 'official' release from souceforge since Jason announced it (see announcements thread). Is that 32-bit only? That release includes the dlls too.
VBCurtis is offline   Reply With Quote
Old 2014-02-13, 04:06   #5
Mini-Geek
Account Deleted
 
Mini-Geek's Avatar
 
"Tim Sorbera"
Aug 2006
San Antonio, TX USA

17×251 Posts
Default

Quote:
Originally Posted by wombatman View Post
You can try this one if you like. I use it without issue. You may need a pthread dll, but you should be able to find that no problem.

Edit: Note that this one does NOT have CUDA enabled. I use it just for the linear algebra.
Got it working using this, thanks!
Mini-Geek is online now   Reply With Quote
Old 2014-02-13, 04:13   #6
wombatman
I moo ablest echo power!
 
wombatman's Avatar
 
May 2013

1,741 Posts
Default

Quote:
Originally Posted by VBCurtis View Post
I have been using the windows 1.52 'official' release from souceforge since Jason announced it (see announcements thread). Is that 32-bit only? That release includes the dlls too.
I think so.

Mini-Geek, happy to help!
wombatman is offline   Reply With Quote
Old 2014-02-13, 14:38   #7
jasonp
Tribal Bullet
 
jasonp's Avatar
 
Oct 2004

2×3×19×31 Posts
Default

The sourceforge release is only for 32-bit windows. Any other binaries will have to come from elsewhere.
jasonp is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
lanczos error: submatrix is not invertible pinhodecarlos Msieve 3 2016-12-10 10:40
"lanczos error: only trivial dependencies found" with massive oversieving eigma Msieve 21 2015-05-28 03:27
Initial vector in Lanczos Robert Holmes Miscellaneous Math 4 2010-09-11 01:34
Lanczos error Andi47 Msieve 7 2009-01-11 19:33
Msieve Lanczos scalability Jeff Gilchrist Msieve 1 2009-01-02 09:32

All times are UTC. The time now is 02:04.

Tue Mar 9 02:04:22 UTC 2021 up 95 days, 22:15, 0 users, load averages: 2.83, 2.98, 2.76

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.