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-   -   Polynomial Request Thread (https://www.mersenneforum.org/showthread.php?t=18368)

richs 2021-11-13 22:13

C173
 
Any help that folks can provide in finding a poly for the C173 of of Aliquot sequence 434040 i3116 would be greatly appreciated. The composite has been ecm'ed to t53. My intention is to sieve on NFS@Home.

[CODE]12050776075231502882593817068581935601907280737083782443835243959335820952907283930452767542745654050294346215107560812052214734803541991962255830406798550871348635810889991[/CODE]

The best poly that I found with 1800 cpu thread-hours search was a 2.234e-013 (record is 2.669e-13).

Many thanks in advance!

Rich

swellman 2021-11-13 23:53

[QUOTE=richs;593069]Any help that folks can provide in finding a poly for the C173 of of Aliquot sequence 434040 i3116 would be greatly appreciated. The composite has been ecm'ed to t53. My intention is to sieve on NFS@Home.

[CODE]12050776075231502882593817068581935601907280737083782443835243959335820952907283930452767542745654050294346215107560812052214734803541991962255830406798550871348635810889991[/CODE]

The best poly that I found with 1800 cpu thread-hours search was a 2.234e-013 (record is 2.669e-13).

Many thanks in advance!

Rich[/QUOTE]

I’m running some msieve-GPU now.

swellman 2021-11-16 12:36

[CODE]# norm 8.943979e-17 alpha -6.891324 e 2.345e-13 rroots 3
skew: 8120075.81
c0: 2395994951805487442022358600584502973668
c1: 6978913699393034060255568271921428
c2: 5377269000346919551326442349
c3: -2334580030712305304514
c4: -84641436795828
c5: 1591920
Y0: -1499059101362196808408532088396405
Y1: 3883644718967177
[/CODE]

Now searching 4-10M, should have results by the weekend.

swellman 2021-11-21 11:52

[QUOTE=swellman;593234]

Now searching 4-10M, should have results by the weekend.[/QUOTE]

Nothing better found. Stopping search.

Perhaps the top poly can be spun up a bit more?

ETA: meant to say end of search via msieve-GPU. CADO may be able to find much better.

richs 2021-11-21 15:06

[QUOTE=swellman;593548]Nothing better found. Stopping search.

Perhaps the top poly can be spun up a bit more?

ETA: meant to say end of search via msieve-GPU. CADO may be able to find much better.[/QUOTE]

Thanks for your efforts, Sean. I'll wait to see if Max can spin it up, and if you find anything better with CADO.

swellman 2021-11-21 17:41

[QUOTE=richs;593555]I'll wait to see if Max can spin it up, and if you find anything better with CADO.[/QUOTE]

Running CADO now. Will take a few days to get results.

Gimarel 2021-11-21 19:20

Here's a reasonably good poly [CODE]# norm 1.374296e-16 alpha -7.731811 e 3.187e-13 rroots 3
skew: 16153366.22
c0: 15345155390883208777550444433706102143744
c1: -1027991494173220824074402840627824
c2: 2326408125025888247170706661
c3: -162918487541952775091
c4: -17054394020490
c5: 75600
Y0: -3945819765830405543714409705318041
Y1: 1681345343107820263583[/CODE]

swellman 2021-11-21 19:39

[QUOTE=Gimarel;593570]Here's a reasonably good poly [CODE]# norm 1.374296e-16 alpha -7.731811 e 3.187e-13 rroots 3
skew: 16153366.22
c0: 15345155390883208777550444433706102143744
c1: -1027991494173220824074402840627824
c2: 2326408125025888247170706661
c3: -162918487541952775091
c4: -17054394020490
c5: 75600
Y0: -3945819765830405543714409705318041
Y1: 1681345343107820263583[/CODE][/QUOTE]

A new record for c173 - by a mile! :jvang:

I’ll let my current CADO run finish up but then I’m done searching.

swellman 2021-11-26 23:33

My CADO search finally finished - didn’t even break 3e-13! My poly search is now terminated.

I updated the [URL="https://www.mersenneforum.org/showpost.php?p=569227&postcount=177"]record e-score[/URL] for c173 to reflect Gimarel’s result. Note that efforts by EdH and Max0526 to spin Gimarel’s poly a bit higher found nothing substantively better.

Ready for GNFS.

unconnected 2021-12-09 22:22

Another C180 needs a good poly, here is my best so far.

[CODE]n: 222146920171387795077091579645923833550235726717373623407154096575951414180644408092225226085631900110882332409569346171040302674403472823926093510188031995244333160296308170575211
# norm 1.646606e-17 alpha -7.810580 e 8.489e-14 rroots 3
skew: 160188814.34
c0: 155648367620806684003090846044441418784715761
c1: 23849100241770002110017524045592337965
c2: 1093246476203908947555093675615
c3: -6171475751958290844885
c4: -43426378184396
c5: 34980
Y0: -91319621129787242654772908129257710
Y1: 2299370888935018561

[/CODE]

firejuggler 2021-12-10 02:47

I'll try to help, but I do not think i'll be very lucky. I can't get the gpu version pf msieve153 to work. The only one wich work with a gpu is msieve150. This version of msieve can't use stage1_norm and stage2_norm restriction.


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