mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 77
Search took 0.04 seconds.
Search: Posts Made By: charybdis
Forum: CADO-NFS 2020-08-04, 02:19
Replies: 110
Views: 2,091
Posted By charybdis
Decided to finally try and figure out what's...

Decided to finally try and figure out what's actually going on...
If I'm understanding the documentation correctly, lambda applies to the *approximation* of the size of the cofactor, based on the...
Forum: CADO-NFS 2020-08-03, 23:28
Replies: 110
Views: 2,091
Posted By charybdis
I've just sieved two c179s with parameters...

I've just sieved two c179s with parameters similar to the consensus from this thread.

The first c179 used parameters
tasks.I = 15
tasks.qmin = 20000000
tasks.lim0 = 95000000
tasks.lim1 =...
Forum: Msieve 2020-07-24, 21:04
Replies: 1,943
Views: 93,885
Posted By charybdis
Wow! A short search on a powerful GPU or a...

Wow! A short search on a powerful GPU or a sizeable cluster? I haven't got anywhere near this with over 100 CPU-days of CADO polyselect.
Forum: Msieve 2020-07-24, 00:50
Replies: 1,943
Views: 93,885
Posted By charybdis
I'll do some CADO work with P=1e7, incr=4620. ...

I'll do some CADO work with P=1e7, incr=4620.
Starting at 5e7, going up to at least 10e7 but probably further.
Forum: Factoring 2020-07-19, 13:56
Replies: 1,810
Views: 119,245
Posted By charybdis
Aha thanks, should have checked further back in...

Aha thanks, should have checked further back in the thread. Has anyone informed Tom about this?
Forum: Factoring 2020-07-18, 18:19
Replies: 1,810
Views: 119,245
Posted By charybdis
What's going on with 7-3_361? It is still...

What's going on with 7-3_361? It is still unfactored in factordb, and it hasn't been removed from the ECM server, but it doesn't appear on Tom Womack's reservation page. Was a factor reported there...
Forum: Msieve 2020-07-11, 22:50
Replies: 163
Views: 19,666
Posted By charybdis
c172

Cofactor of Homogeneous Cunningham 10+9_610L:

n:...
Forum: Msieve 2020-07-01, 18:20
Replies: 1,943
Views: 93,885
Posted By charybdis
A better one: n:...

A better one:

n: 525192933198425310942568096373679376573022392355599200733494017859956132656856970821636003559353551074362384941717314333715490580942355722743279047483667544381553532051041
skew:...
Forum: CADO-NFS 2020-06-29, 01:32
Replies: 15
Views: 1,088
Posted By charybdis
Here are a couple better polys for 86^131-1: ...

Here are a couple better polys for 86^131-1:

n:...
Forum: CADO-NFS 2020-06-28, 16:38
Replies: 15
Views: 1,088
Posted By charybdis
One more data point: the c169 from 9+8_638M. ...

One more data point: the c169 from 9+8_638M.

Parameters were
tasks.I = 14
tasks.qmin = 7000000
tasks.lim0 = 50000000
tasks.lim1 = 70000000
tasks.lpb0 = 31
tasks.lpb1 = 31
tasks.sieve.mfb0 =...
Forum: CADO-NFS 2020-06-22, 03:08
Replies: 4
Views: 294
Posted By charybdis
From the output of las -h: -q0 ...

From the output of las -h:

-q0 left bound of special-q range
-q1 right bound of special-q range
...
-nq Process this number of special-q's and stop

-nq does...
Forum: CADO-NFS 2020-06-19, 23:58
Replies: 4
Views: 294
Posted By charybdis
I think the problem is that you haven't made the...

I think the problem is that you haven't made the factor base yet - that's what -fb1 is supposed to be pointing to. You can construct it by a command like
./makefb -poly 732541-47.txt -lim 536000000...
Forum: Msieve 2020-06-17, 17:15
Replies: 1,943
Views: 93,885
Posted By charybdis
Try this: n:...

Try this:
n: 18119085669666404730202484342014872947682403489674125395236236588623428666177690467622729092327751605871573519020781055449161049075427646165049560534028966783532365417239588333
skew:...
Forum: Factoring 2020-06-11, 16:51
Replies: 497
Views: 54,827
Posted By charybdis
Lucky ECM hit, from 3+2_1842M from the HCN...

Lucky ECM hit, from 3+2_1842M from the HCN tables:

GMP-ECM 7.0.5-dev [configured with GMP 6.2.0, --enable-asm-redc, --enable-assert] [ECM]
Input number is...
Forum: YAFU 2020-06-08, 22:35
Replies: 57
Views: 9,614
Posted By charybdis
Not having any success unfortunately. Trying to...

Not having any success unfortunately. Trying to build r383 with either GMP-6.2.0 or 6.1.2 fails with
arith/monty.c:36:17: error: redefinition of '_umul128'
36 | __inline uint64 _umul128(uint64...
Forum: YAFU 2020-06-08, 21:07
Replies: 57
Views: 9,614
Posted By charybdis
Please ignore the r379 binary I posted above: it...

Please ignore the r379 binary I posted above: it suffers from the issue described in this thread (https://www.mersenneforum.org/showthread.php?t=23087) where GMP-6.2.0 incompatibility causes a crash...
Forum: YAFU 2020-06-08, 19:43
Replies: 57
Views: 9,614
Posted By charybdis
I have access to a Xeon E5645 (also Nehalem) but...

I have access to a Xeon E5645 (also Nehalem) but I don't have admin rights and there isn't a compiler installed, so I had to compile on a newer system and test on the old one. I couldn't get r387 to...
Forum: YAFU 2020-06-08, 12:48
Replies: 57
Views: 9,614
Posted By charybdis
Whoops, I used GMP-ECM and msieve libraries that...

Whoops, I used GMP-ECM and msieve libraries that I compiled a few months ago on the same machine, and of course those might be incompatible with older CPUs - I suspect the binary I posted won't work...
Forum: YAFU 2020-06-07, 23:03
Replies: 57
Views: 9,614
Posted By charybdis
Here's an attempt. Compiled with SSE4.1,...

Here's an attempt. Compiled with SSE4.1, apologies to anyone with really old computers. If your CPU supports AVX-512 there should be a substantial speedup but you'll need to ask someone else for a...
Forum: Aliquot Sequences 2020-05-30, 00:59
Replies: 406
Views: 26,086
Posted By charybdis
Definitely looking like a slight speedup - WUs...

Definitely looking like a slight speedup - WUs are taking ~42 min on average with 3 threads compared to ~23 min with 6 threads. I'll switch the other 6-thread machines to running two clients too.
Forum: Aliquot Sequences 2020-05-29, 22:38
Replies: 406
Views: 26,086
Posted By charybdis
I've killed one of these clients and started two...

I've killed one of these clients and started two clients with -t 3 on the same machine instead. They are both running at a load of almost exactly 3, as expected. I'll watch the timings to see if this...
Forum: Aliquot Sequences 2020-05-29, 22:17
Replies: 406
Views: 26,086
Posted By charybdis
The first WU didn't restart for me. The original...

The first WU didn't restart for me. The original range was 22690000-22695000; I noticed almost immediately that I'd got the wrong number of threads and killed the client. When I started again with...
Forum: Aliquot Sequences 2020-05-29, 18:06
Replies: 406
Views: 26,086
Posted By charybdis
Curtis, I've thrown a few more clients your way -...

Curtis, I've thrown a few more clients your way - should speed things up a little. Forgot to set the number of threads on one of them at first, so you'll get an expired WU at some point.
Forum: Aliquot Sequences 2020-05-28, 15:25
Replies: 406
Views: 26,086
Posted By charybdis
I think it might depend on lpb0 and lpb1 too?...

I think it might depend on lpb0 and lpb1 too? They correspond to Bf and Bg in the line
# MurphyE (Bf=4.295e+09,Bg=4.295e+09,area=1.342e+16) = 5.807e-09
Forum: Aliquot Sequences 2020-05-28, 01:02
Replies: 406
Views: 26,086
Posted By charybdis
From the CADO c90.params file: # Note:...

From the CADO c90.params file:

# Note: now I is used also in the polynomial selection (for the computation
# of Murphy's E value) thus we define it at the "tasks" level, not at the
#...
Showing results 1 to 25 of 77

 
All times are UTC. The time now is 17:02.

Wed Aug 5 17:02:57 UTC 2020 up 19 days, 12:49, 1 user, load averages: 1.80, 1.92, 2.03

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, 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.