GNFS targets which need more ECM - Page 5

VBCurtis · 2016-04-08, 16:42

Quote:

Originally Posted by swellman

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?

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.

swellman · 2016-04-08, 18:35

Quote:

Originally Posted by VBCurtis

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.

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.

Ok.

XYYXF · 2016-04-24, 12:53

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

swellman · 2016-04-27, 23:52

Quote:

Originally Posted by XYYXF

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

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

wombatman · 2016-04-30, 06:30

I'll do the 18k curves on C173_139_59.

swellman · 2016-04-30, 09:45

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

swellman · 2016-05-09, 10:51

Quote:

Originally Posted by swellman

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

Fully factored by ECM

Code:

p60 = 142605715251108746997064499457693518817992625513392698520987

B1=11e7
B2=gmp-ecm default
Sigma=2405137795

swellman · 2016-05-09, 11:54

Reserving C178_131_81 for ECM to t55.

swellman · 2016-05-09, 17:08

Reserving the following for ECM to t55:

C178_133_71
C187_142_59
C173_145_56

Thanks.

wombatman · 2016-05-15, 14:03

C173_139_59 withstood 18k+ curves at 110M.

swellman · 2016-06-27, 11:17

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.

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2016-04-30, 06:30	#49
wombatman I moo ablest echo power! May 2013 29×61 Posts	I'll do the 18k curves on C173_139_59.

2016-04-30, 09:45	#50
swellman Jun 2012 2²×13×59 Posts	I will start towards a full t55 on C177_132_91. It will take awhile.

2016-05-09, 11:54	#52
swellman Jun 2012 BFC₁₆ Posts	Reserving C178_131_81 for ECM to t55.

2016-05-09, 17:08	#53
swellman Jun 2012 2²×13×59 Posts	Reserving the following for ECM to t55: C178_133_71 C187_142_59 C173_145_56 Thanks.

2016-05-15, 14:03	#54
wombatman I moo ablest echo power! May 2013 3351₈ Posts	C173_139_59 withstood 18k+ curves at 110M.

2016-06-27, 11:17	#55
swellman Jun 2012 2²·13·59 Posts	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.