SNFS targets which need more ECM

XYYXF · 2016-04-24, 11:36

Here we'll collect potential SNFS targets which need some more ECM work. Usually ECM is stopped when the expected factor size is about 22% of SNFS difficulty.

There's a small table with work-to-do information (r means reserved):

Code:

 Composite   |  300M  |
-------------|--------|
C256_127_121 |  done  | fivemack completed 10240@3e8 4/Feb/17 0145
C278_135_128 |  done  | fivemack completed 20920@3e8 6/Mar/17 0349
C237_139_126 |  r(2)/30k | fivemack reserved 20/May/17 for 30720@3e8
C277_148_81  |  factor found | fivemack reserved 1/May/17 for 25600@3e8; completed 3/5/17
C228_150_142 |  0/20k | fivemack reserved 3/5/17 for 25600@3e8; completed 1/6/17

As soon as ECM is done on some target, it will be moved to the nearby thread.

Any ECM help will be greatly appreciated :-)

swellman · 2016-04-25, 14:13

I will run some ECM on C237_142_49 @B1=11e7. Targeting 5000 curves.

swellman · 2016-04-27, 23:19

I must withdraw my reservation. Smoked one computer (it was old) and repairs make no economic sense. Looking to replace it but that might take a couple of months.

wombatman · 2016-04-28, 03:00

I'll do the 5k curves. It'll take a little bit since I'm doing GPU+CPU, but I'll update when they finish.

wombatman · 2016-04-30, 03:01

Stage 1 on GPU is finished. Stage 2 will take ~60 hours to complete, assuming no factor is found.

wombatman · 2016-05-03, 21:11

C237_142_49 held up. No factor found after 5632 curves at B1=110e6.

fivemack · 2016-05-04, 09:21

OK, I'm doing some test sieving now and will feed it to nfs@home

fivemack · 2016-05-09, 09:31

May I request that

C273_150_142
C277_148_81
C278_135_128

be added to this list. They're all of a size where nfs@home 15e will take two months to sieve, so probably do want substantial (say 20k @ 3e8, which is about half a t60 or four weeks on one GPU) ECM. Probably a job for yoyo@home.

I'll reserve C284_135_127 and run it for four weeks on my one GPU.

XYYXF · 2016-05-10, 12:01

OK :)

Please note that C273_150_142 and C277_148_81 are still waiting for t50 in yoyo's queue: http://www.rechenkraft.net/yoyo/down...m/xy/wu_status

fivemack · 2016-05-23, 06:47

4160 curves done at 3e8 on C284_135_127 with no factor found. 16224 to go. Probably another three weeks.

swellman · 2016-07-01, 12:27

Request that C175_133_61 be added to the list. I will be running 6000 curves @B1=11e7 on it for eventual queuing to NFS@Home (14e).

2016-04-24, 11:36	#1
XYYXF Jan 2005 Minsk, Belarus 2⁴×5² Posts	SNFS targets which need more ECM Here we'll collect potential SNFS targets which need some more ECM work. Usually ECM is stopped when the expected factor size is about 22% of SNFS difficulty. There's a small table with work-to-do information (r means reserved): Code: Composite \| 300M \| -------------\|--------\| C256_127_121 \| done \| fivemack completed 10240@3e8 4/Feb/17 0145 C278_135_128 \| done \| fivemack completed 20920@3e8 6/Mar/17 0349 C237_139_126 \| r(2)/30k \| fivemack reserved 20/May/17 for 30720@3e8 C277_148_81 \| factor found \| fivemack reserved 1/May/17 for 25600@3e8; completed 3/5/17 C228_150_142 \| 0/20k \| fivemack reserved 3/5/17 for 25600@3e8; completed 1/6/17 As soon as ECM is done on some target, it will be moved to the nearby thread. Any ECM help will be greatly appreciated :-) Last fiddled with by fivemack on 2017-06-01 at 09:43

2016-05-10, 12:01	#9
XYYXF Jan 2005 Minsk, Belarus 2⁴·5² Posts	OK :) Please note that C273_150_142 and C277_148_81 are still waiting for t50 in yoyo's queue: http://www.rechenkraft.net/yoyo/down...m/xy/wu_status Last fiddled with by XYYXF on 2016-05-11 at 23:39

2016-05-23, 06:47	#10
fivemack (loop (#_fork)) Feb 2006 Cambridge, England 6454₁₀ Posts	4160 curves done at 3e8 on C284_135_127 with no factor found. 16224 to go. Probably another three weeks. Last fiddled with by fivemack on 2016-05-23 at 06:47

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2016-04-25, 14:13	#2
swellman Jun 2012 F08₁₆ Posts	I will run some ECM on C237_142_49 @B1=11e7. Targeting 5000 curves.

2016-04-27, 23:19	#3
swellman Jun 2012 111100001000₂ Posts	I must withdraw my reservation. Smoked one computer (it was old) and repairs make no economic sense. Looking to replace it but that might take a couple of months.

2016-04-28, 03:00	#4
wombatman I moo ablest echo power! May 2013 2²·463 Posts	I'll do the 5k curves. It'll take a little bit since I'm doing GPU+CPU, but I'll update when they finish.

2016-04-30, 03:01	#5
wombatman I moo ablest echo power! May 2013 2²×463 Posts	Stage 1 on GPU is finished. Stage 2 will take ~60 hours to complete, assuming no factor is found.

2016-05-03, 21:11	#6
wombatman I moo ablest echo power! May 2013 3474₈ Posts	C237_142_49 held up. No factor found after 5632 curves at B1=110e6.

2016-05-04, 09:21	#7
fivemack (loop (#_fork)) Feb 2006 Cambridge, England 2·7·461 Posts	OK, I'm doing some test sieving now and will feed it to nfs@home

2016-05-09, 09:31	#8
fivemack (loop (#_fork)) Feb 2006 Cambridge, England 2×7×461 Posts	May I request that C273_150_142 C277_148_81 C278_135_128 be added to this list. They're all of a size where nfs@home 15e will take two months to sieve, so probably do want substantial (say 20k @ 3e8, which is about half a t60 or four weeks on one GPU) ECM. Probably a job for yoyo@home. I'll reserve C284_135_127 and run it for four weeks on my one GPU.

2016-07-01, 12:27	#11
swellman Jun 2012 2³·13·37 Posts	Request that C175_133_61 be added to the list. I will be running 6000 curves @B1=11e7 on it for eventual queuing to NFS@Home (14e).