GNFS targets which need more ECM - Page 19

VBCurtis · 2017-01-20, 04:15

If you post the candidate, I'll give it a GPU-week or so also.

axn · 2017-01-20, 06:24

Quote:

Originally Posted by VBCurtis

If you post the candidate, I'll give it a GPU-week or so also.

Do you mean...

Quote:

Originally Posted by XYYXF

C187_142_67:

Code:

7128360149039274062977936286065067193399002753241614879146717358452822451341395399593821536547721254531403479426890031997079861053249682361463634809511739986354847541601144102179145030773

?

fivemack · 2017-01-20, 09:41

Code:

# norm 2.487456e-18 alpha -7.594135 e 2.676e-14 rroots 3
skew: 41513183.61
c0: 590718468581864442785320612792179279048413037
c1: -60315604676429730640453545272705635779
c2: -3691304610135624755699990792427
c3: 143451621253305321261431
c4: 1778771937092410
c5: 10186128
Y0: -931099515914334049323921550168433960
Y1: 938700260762687809

axn · 2017-01-20, 10:58

Quote:

Originally Posted by fivemack

I think C187_142_67 is a GNFS number: the SNFS difficulty is something like 268, the Murphy E score for the SNFS polynomial is 2.29e-14 and I've already found a 1.83e-14 GNFS polynomial after half a CPU-hour.

What is the SNFS poly that you used? The obvious deg-5 poly gives me 1.967e-014 (msieve 1.52 SVN 883).

VBCurtis · 2017-01-21, 17:47

Quote:

Originally Posted by fivemack

3*48 hours has already got a 2.403e-14 for C187_142_67, so I'll leave it running for a week and see what comes out after 50x the search effort.

Day 1 produced one -nps hit that created 15 >2.6 polys. The best is 2.69e-14:

Code:

# norm 2.519980e-18 alpha -7.877655 e 2.691e-14 rroots 5
skew: 796505294.26
c0: 2010146466315431607051182869125354468602252488320
c1: 21021075526316357473052287745434333152518
c2: -7063581463519888846112385379275
c3: -83171155788431258558172
c4: 19644470833760
c5: 44520
Y0: -2759859005547672334817856462544851083
Y1: 237601316771857523

The hit from the .ms file:

Code:

44520 13417839747560 -85020812669358898315852 -1638422228497349358550532842 4393340096227226998761406168628915324 25258958122617254442154655208594636431911 237601316771857523 -2759859005554318587042176774701316184 -1.73 3.447237e+24

I'll continue.

Max0526 · 2017-01-22, 03:08

@VBCurtis
CADO-NFS optimized it to 2.738e-14

Code:

Y0: -2759859005590857354959377201577956027
Y1: 237601316771857523
c0: -765129451917285437415086421082431456047557043040
c1: 15117301960901964645196581264140448523494
c2: 39507144600491335712925451735413
c3: -82746022986425206646492
c4: -20813998059040
c5: 44520
skew: 796074353.15763
# MurphyE=2.73764958e-14

VBCurtis · 2017-01-23, 22:37

New best poly at 2.70 (best from me, Max's improvement to 2.73 obv better!)

Code:

# norm 2.583477e-18 alpha -7.037630 e 2.704e-14 rroots 5
skew: 120441920.36
c0: -779752379042084019351216845371921621699858417
c1: 124906007840752885515797261826670319166
c2: 968974773060694372695208917336
c3: -102332217933064581638694
c4: -82187691454007
c5: 395160
Y0: -1783377698392009317033427233156061740
Y1: 79930227817173811

my search continues.

fivemack · 2017-01-23, 23:23

Code:

# norm 2.911299e-18 alpha -8.826260 e 2.967e-14 rroots 3
skew: 69216073.02
c0: 7791668871251188939128663076825840540007014080
c1: -373194573526822928372355940119382579276
c2: -11860098119925066239428960311244
c3: 61799166807858671402829
c4: 1042037647437326
c5: 14765520
Y0: -864466518751436348614828246084968923
Y1: 736747266659805697

Code:

# norm 2.655099e-18 alpha -7.668453 e 2.789e-14 rroots 5
skew: 65594208.93
c0: 666202763940419537990712263476912386714340651
c1: 281438480325789828731054736036985572473
c2: 5572489858395487567354026433987
c3: -158978595393172232153597
c4: -1053654115525274
c5: 12732720
Y0: -890458510429829301987491366936381460
Y1: 1139819561997784163

Code:

# norm 2.589890e-18 alpha -7.813380 e 2.735e-14 rroots 5
skew: 58681987.56
c0: 1216989697805529312992420747980260096797167200
c1: 164202972312382998523803974394341617932
c2: -10937467284878795055181164965520
c3: -71902416419046623893777
c4: 3199062929460250
c5: 12862200
Y0: -888658450373383752859693080357272477
Y1: 1990274503596970519

This is definitely a GNFS job; I'd be delighted if Max0526 could work his magic on any of those. My search job finishes Wednesday evening; there's no great urgency to queue this up because the 15e queue is moving rather slowly.

fivemack · 2017-01-24, 00:01

23040 curves at B1=3e8 run on C194_144_91 with no factors found.

Max0526 · 2017-01-24, 04:55

@fivemack
I tested all 4. CADO's pick (same E):

Code:

Y0: -864466518751920998648771466107792251
Y1: 736747266659805697
c0: 8032015570935865865531524781218772544578832960
c1: -357511804335807522921950785909297366348
c2: -11979393536227984344628710463276
c3: 59121152505587189523533
c4: 993472080294926
c5: 14765520
skew: 69214448.17396
# alpha -8.83, 3 real roots
# MurphyE=2.96677286e-14

XYYXF · 2017-01-25, 19:28

C141_145_59 needs GNFS :)

Code:

331076896768071832558398356558667158704314056309264427185918244666137225240050834579237533221460012040297282400922664339220136313630094663941

2017-01-25, 19:28	#209
XYYXF Jan 2005 Minsk, Belarus 110010000₂ Posts	C141_145_59 needs GNFS :) Code: 331076896768071832558398356558667158704314056309264427185918244666137225240050834579237533221460012040297282400922664339220136313630094663941 Last fiddled with by XYYXF on 2017-01-25 at 19:28

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Ready GNFS targets	XYYXF	XYYXF Project	86	2020-03-07 16:23
SNFS targets which need more ECM	XYYXF	XYYXF Project	57	2017-07-04 19:15
Ready SNFS targets	XYYXF	XYYXF Project	25	2016-11-20 21:35
3,697+ (GNFS 220.9)	pinhodecarlos	NFS@Home	0	2014-12-24 19:13
3,766+ (GNFS 215.5)	pinhodecarlos	NFS@Home	34	2014-04-01 21:27

2017-01-20, 04:15	#199
VBCurtis "Curtis" Feb 2005 Riverside, CA 4,861 Posts	If you post the candidate, I'll give it a GPU-week or so also.

2017-01-24, 00:01	#207
fivemack (loop (#_fork)) Feb 2006 Cambridge, England 7²·131 Posts	23040 curves at B1=3e8 run on C194_144_91 with no factors found.