2016-04-19, 15:39 | #1 |
"Daniel Jackson"
May 2011
14285714285714285714
2^{2}×151 Posts |
NFS filtering error...
Can someone please tell me why I'm having trouble factoring this:
2070901086375232525076427110182112190197946724040560217887081294832832281183468746602219497219028189923582071411 I keep getting thousands of "error -11 reading relation xxxxx" lines in nfs.log during the filtering stage. How do I fix this? I don't want to start all over. The number is from this sequence. Here's my nfs.job: Code:
n: 2070901086375232525076427110182112190197946724040560217887081294832832281183468746602219497219028189923582071411 skew: 79263.41 c0: 937866915839812843132381584 c1: -65269251738929456400054 c2: -3995541263443621369 c3: -106346874617468 c4: 756057360 c5: 3672 Y0: -3550187376369013839095 Y1: 12162136159 rlim: 3720000 alim: 3720000 lpbr: 26 lpba: 26 mfbr: 52 mfba: 52 rlambda: 2.5 alambda: 2.5 Code:
N 2070901086375232525076427110182112190197946724040560217887081294832832281183468746602219497219028189923582071411 A0 937866915839812843132381584 A1 -65269251738929456400054 A2 -3995541263443621369 A3 -106346874617468 A4 756057360 A5 3672 R0 -3550187376369013839095 R1 12162136159 Last fiddled with by Stargate38 on 2016-04-19 at 16:00 Reason: link to nfs.dat |
2016-04-19, 17:55 | #2 |
I moo ablest echo power!
May 2013
3·577 Posts |
Edit: Nevermind. I completely missed the "thousands of them" bit. Sorry. Last fiddled with by wombatman on 2016-04-19 at 17:57 |
2016-04-19, 23:15 | #3 |
Basketry That Evening!
"Bunslow the Bold"
Jun 2011
40<A<43 -89<O<-88
7197_{10} Posts |
Given that filtering probably requires a ~few million relations, a ~few thousand errors is still well under 1% of the total number of relations, and shouldn't be a problem. Even 100,000 errors is still recoverable by still doing just a bit more sieving.
What's the filtering log say? |
2016-04-20, 15:51 | #4 |
"Daniel Jackson"
May 2011
14285714285714285714
2^{2}·151 Posts |
Here's my nfs.log (14.2 MB uncompressed). Notice how I kept retrying, to see if it was a bug or not.
Last fiddled with by Stargate38 on 2016-04-20 at 15:53 |
2016-04-20, 16:53 | #5 |
Sep 2009
11101110111_{2} Posts |
You would get errors like that if your nfs.dat contains relations from more that 1 job. Every relation from a previous job will generate an error message. And msieve gets confused if the total number of relations it read is much greater than the number of valid unique relations.
You might be able to fix this by deleting the invalid relations from nfs.dat. The last error message is for relation 161019 so try deleting the first 161019 lines from nfs.dat and re-running. MAKE A BACKUP COPY OF nfs.dat FIRST!! If you still get lots of error -11 messages let it run until it stops producing them. If it fails to factor the number note the number on the last message and delete that many from start of nfs.dat again. Good luck. Chris |
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