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 threadhours search was a 2.234e013 (record is 2.669e13). Many thanks in advance! Rich 
[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 threadhours search was a 2.234e013 (record is 2.669e13). Many thanks in advance! Rich[/QUOTE] I’m running some msieveGPU now. 
[CODE]# norm 8.943979e17 alpha 6.891324 e 2.345e13 rroots 3
skew: 8120075.81 c0: 2395994951805487442022358600584502973668 c1: 6978913699393034060255568271921428 c2: 5377269000346919551326442349 c3: 2334580030712305304514 c4: 84641436795828 c5: 1591920 Y0: 1499059101362196808408532088396405 Y1: 3883644718967177 [/CODE] Now searching 410M, should have results by the weekend. 
[QUOTE=swellman;593234]
Now searching 410M, 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 msieveGPU. CADO may be able to find much better. 
[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 msieveGPU. 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. 
[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. 
Here's a reasonably good poly [CODE]# norm 1.374296e16 alpha 7.731811 e 3.187e13 rroots 3
skew: 16153366.22 c0: 15345155390883208777550444433706102143744 c1: 1027991494173220824074402840627824 c2: 2326408125025888247170706661 c3: 162918487541952775091 c4: 17054394020490 c5: 75600 Y0: 3945819765830405543714409705318041 Y1: 1681345343107820263583[/CODE] 
[QUOTE=Gimarel;593570]Here's a reasonably good poly [CODE]# norm 1.374296e16 alpha 7.731811 e 3.187e13 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. 
My CADO search finally finished  didn’t even break 3e13! My poly search is now terminated.
I updated the [URL="https://www.mersenneforum.org/showpost.php?p=569227&postcount=177"]record escore[/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. 
Another C180 needs a good poly, here is my best so far.
[CODE]n: 222146920171387795077091579645923833550235726717373623407154096575951414180644408092225226085631900110882332409569346171040302674403472823926093510188031995244333160296308170575211 # norm 1.646606e17 alpha 7.810580 e 8.489e14 rroots 3 skew: 160188814.34 c0: 155648367620806684003090846044441418784715761 c1: 23849100241770002110017524045592337965 c2: 1093246476203908947555093675615 c3: 6171475751958290844885 c4: 43426378184396 c5: 34980 Y0: 91319621129787242654772908129257710 Y1: 2299370888935018561 [/CODE] 
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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