[QUOTE=swellman;431043]I ran some test sieving using a Win64 box with an i5-3340M processor. Results follow, but GNFS is the clear winner.

gnfs 15e 31 a 49 1.68 150 50 10000

Do we need to run more ECM (5000 curves @B1=26e7) prior to starting GNFS?[/QUOTE]

Could you try another test-sieve with these parameters but 32-bit LP? Even if NFS@home will run it as 31, I'd like to know how much time 32 would save.

A t55 should be plenty of ECM for this number. I'm still running the C195 from the poly request thread, so I won't be able to improve this poly for another week or so.

[QUOTE=VBCurtis;431044]Could you try another test-sieve with these parameters but 32-bit LP? Even if NFS@home will run it as 31, I'd like to know how much time 32 would save.[/quote]

Done.

gnfs 15e 32 a 66 3.16 150 50 10000

[quote]A t55 should be plenty of ECM for this number. I'm still running the C195 from the poly request thread, so I won't be able to improve this poly for another week or so.[/QUOTE]

Ok.

Let's strew some 110M curves on C177_132_91 and C178_131_81. Once they survive, test sieving will clear up their status (GNFS/SNFS).
[code]// C178_131_81
9665594746635471193631401610305223441026454871232104654184978793903680411628939306459447967671907712555259632196378072766508008145078274293025707034749562219382254626268701104791

// C177_132_91
155559677364893070934785846580006701224317170617385105940830204750196640320067857569016305699618930674035553847614928335155387093050358174227213931437141745113915559030979450653[/code]

[QUOTE=XYYXF;432413]Let's strew some 110M curves on C177_132_91 and C178_131_81. Once they survive, test sieving will clear up their status (GNFS/SNFS).
[code]// C178_131_81
9665594746635471193631401610305223441026454871232104654184978793903680411628939306459447967671907712555259632196378072766508008145078274293025707034749562219382254626268701104791

// C177_132_91
155559677364893070934785846580006701224317170617385105940830204750196640320067857569016305699618930674035553847614928335155387093050358174227213931437141745113915559030979450653[/code][/QUOTE]

Bump. I can help with these in a couple of weeks but a group ECM effort would speed things up.

I'll do the 18k curves on C173_139_59.

I will start towards a full t55 on C177_132_91. It will take awhile.

[QUOTE=swellman;432829]I will start towards a full t55 on C177_132_91. It will take awhile.[/QUOTE]

Fully factored by ECM

[code]
p60 = 142605715251108746997064499457693518817992625513392698520987

B1=11e7
B2=gmp-ecm default
Sigma=2405137795
[/code]

Reserving C178_131_81 for ECM to t55.

Reserving the following for ECM to t55:

C178_133_71
C187_142_59
C173_145_56

Thanks.

C173_139_59 withstood 18k+ curves at 110M.

C178_131_81 and C178_133_71 both survived 18000 curves @B1=11e7 with no factors found.

C173_145_56 survived 12000 curves @B1=11e7, now Fivemack is factoring it. Please transfer the reservation to him.

C187_142_59 is still under ECM towards t55. Estimate ~2 weeks to finish it.

Thank you.