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2022-01-28, 01:51   #12
charybdis

Apr 2020

7×163 Posts

Quote:
 Originally Posted by RichD This is a 31/33 hybrid job. I don't know the proper amount of raw relations so I assumed it would be equivalent to a 32/32 job.
It will likely be ~20% more than a 32/32 job. I suspect 31/33 is not optimal when you account for this.

2022-01-28, 02:28   #13
RichD

Sep 2008
Kansas

33×149 Posts

Quote:
 Originally Posted by charybdis It will likely be ~20% more than a 32/32 job. I suspect 31/33 is not optimal when you account for this.
I was getting a 20% increase in runtime (sec/rel) at a low Q with only a slight increase in yield thinking this would be better than a 32/33 job which would need more relations. I need to run the full gamut. Please hold off until further testing.

2022-01-28, 02:48   #14
swellman

Jun 2012

408110 Posts

Quote:
 This is a 31/33 hybrid job. I don't know the proper amount of raw relations so I assumed it would be equivalent to a 32/32 job. This is estimated to be around 435M total relations. Feel free to adjust accordingly.
I use the average of target relations for each lpb plus a bit, in this case (260M+930M)/2 = 595M ~ 620M+ (I target 650M but I tend go heavy on the # of relations).

2022-01-28, 03:32   #15
VBCurtis

"Curtis"
Feb 2005
Riverside, CA

3·1,999 Posts

Quote:
 Originally Posted by swellman I use the average of target relations for each lpb plus a bit, in this case (260M+930M)/2 = 595M ~ 620M+ (I target 650M but I tend go heavy on the # of relations).
I think it should be a geometric average, which would land not-much-higher than a 32/32 job. If 440M would do for 32/32, something like 475M should do for this 31/33. That said, I don't think 31/33 is going to be faster for a sextic. You could run mfbr at 62 but lpbr at 32, which should reduce the number of raw relations needed by a dozen million or two- say, to maybe 620M instead of 640M.

2022-01-28, 13:42   #16
charybdis

Apr 2020

7·163 Posts

Quote:
 Originally Posted by VBCurtis I think it should be a geometric average, which would land not-much-higher than a 32/32 job.
I've only ever run one sizeable job with lpbs skewed by 2, which was a difficulty-229 quartic with lpb 32/30, but I remember needing substantially more relations than I'd initially expected - closer to the arithmetic mean than the geometric mean. In hindsight I shouldn't have been surprised: the number of possible ideals with 32/30 is roughly the arithmetic mean of 30/30 and 32/32, and while this isn't a perfect predictor of the number of relations, it should at least scale about the same.

 2022-02-03, 13:27 #17 swellman     Jun 2012 FF116 Posts QUEUED AS 5m3_425 5-3,425 is another HCN quartic SNFS of difficulty 237.6. It has survived 32,247 curves of ECM @B1=260M and is ready for SNFS. Code: n: 3615585585196150831178452864134253581298092586172168742490880669239890638015724859218917122864482115049097469572394129723238144231684858711215525897319073505719861946180872195895735426929275351 skew: 1.0000 type: snfs size: 237 c4: 1 c3: 1 c2: 1 c1: 1 c0: 1 Y1: -35917545547686059365808220080151141317043 Y0: 258493941422821148397315216271863391739316284656524658203125 rlim: 134000000 alim: 266000000 lpbr: 33 lpba: 31 mfbr: 96 mfba: 62 rlambda: 3.7 alambda: 2.7 Results of test sieving on the -r side with Q in blocks of 1000: Code: MQ Norm_yield Speed (sec/rel) 35 2366 0.400 65 2856 0.381 100 2936 0.391 150 2993 0.397 200 2780 0.451 250 2734 0.432 Suggesting a sieving range of 35-260M to generate 635M raw relations. Last fiddled with by swellman on 2022-02-17 at 13:41
2022-02-04, 06:06   #18
VBCurtis

"Curtis"
Feb 2005
Riverside, CA

3×1,999 Posts

Quote:
 Originally Posted by VBCurtis May I have another 15MQ on 13_2_922m1? 600M raw relations looks a little light; I've been targeting 620-630M. Done.
619M relations got me a 31.7M matrix, 3-4M dimensions bigger than similar recent jobs. This job is a few SNFS digits bigger, so I'll call that good 'nuff and get to solving. This one can be moved to postprocessing.

 2022-02-19, 01:27 #19 unconnected     May 2009 Moscow, Russia 3×997 Posts QUEUED AS C191_933436_12595 C191 from 933436:i12595 for 15e queue. Thanks Gimarel for the ploy! Code: n: 95943792139492908765333071790605979163835027624974805898350717773405577196123295473856044969264458190095842686539462763700839439312300013661751809241655826533008542372113621303929192489690417 # norm 1.457307e-18 alpha -8.343892 e 1.949e-14 rroots 5 skew: 206761148.35 c0: 18645184046033077167247177836639821624045365940 c1: 670519807821465463730496628562844466976 c2: -18498861485056615649666134341771 c3: -170301411285433552736437 c4: 453902219052530 c5: 277200 Y0: -14724839720475995757223413748323367213 Y1: 15912761554705719950713 rlim: 268000000 alim: 134000000 lpbr: 32 lpba: 33 mfbr: 64 mfba: 96 rlambda: 2.8 alambda: 3.7 type: gnfs lss: 0 Suggesting sieve range is 40M-300M. Last fiddled with by swellman on 2022-02-19 at 02:20
 2022-03-03, 22:34 #20 RichD     Sep 2008 Kansas 1111101101112 Posts QUEUED AS 331_109m1 C255 from the OPN t550 file. Second attempt to optimize the parameters. This should run a bit faster though the special-Q range is about the same. Estimate of 625M raw relations. Code: n: 456144099782224315696824095020150332081139148797304856352191816675514369613259984102145549799476807322037325051749567250153209607473297001774552409742710930294846495418796912917131669944275190656583437621142715383063574336648632009217696108548318826496061 # 331^109-1, difficulty: 274.66, skewness: 0.38, alpha: 0.00 # cost: 5.17803e+19, est. time: 24657.29 GHz days (not accurate yet!) skew: 0.380 c6: 331 c0: -1 Y1: -1 Y0: 2274593993441843779293942507658183948042259641 type: snfs rlim: 134000000 alim: 268000000 lpbr: 32 lpba: 33 mfbr: 64 mfba: 96 rlambda: 2.7 alambda: 3.4 Increasing lambda will increase the yield by 1-2% but add 2-4% to timing. Trial sieving 5K blocks. Code:  Q Yield 40M 15514 70M 14241 100M 14472 200M 12038 280M 10788 Last fiddled with by swellman on 2022-03-04 at 12:11
 2022-03-04, 19:16 #21 swellman     Jun 2012 7·11·53 Posts 3+2,625 QUEUED AS 3p2_625 3+2,625 is another HCN which has finished ECM. It has a quartic SNFS polynomial with difficulty 238. Code: n: 1350872366946090935056059296879491581002005646059700802359454035513008730498298808685203195085142436073615149011559333058816162978238818959084242569301395890887217531261929477924397448314567011799166352011282568751 type: snfs size: 238 skew: 1.0000 c4: 1 c3: -1 c2: 1 c1: -1 c0: 1 Y1: -42535295865117307932921825928971026432 Y0: 436673502879206784130402698570834024654748577491697818855443 rlim: 134000000 alim: 266000000 lpbr: 33 lpba: 31 mfbr: 96 mfba: 62 rlambda: 3.7 alambda: 2.7 Test sieving on the rational side with Q in blocks of 1000: Code: MQ Norm_yield Speed (sec/rel) 40 2350 0.406 70 2855 0.371 100 2749 0.418 150 2866 0.414 200 2630 0.447 250 2445 0.441 300 2611 0.414 Suggesting a sieving range for Q of 40-280M to generate 640M raw relations. Last fiddled with by swellman on 2022-03-04 at 19:29
 2022-03-07, 13:19 #22 swellman     Jun 2012 7·11·53 Posts QUEUED AS 9m5_625M 9-5,625M is a HCN which has finished ECM and is now ready for NFS. It is a quartic SNFS of difficulty 238, and should be sieved on the rational side using 15e. Code: n: 36360291795869945870161648600451934503491829289459342379822806979996844112392800728837229871877907393616438168811949664371251367603949464962031840484992514841107766422315320491625665424163725530585973435284509712227587890122410608365891251 type: snfs size: 238 skew: 1.0000 c4: 1 c3: 5 c2: 15 c1: 25 c0: 25 Y1: 21684043449710088680149056017398834228515625 Y0: -436673502879206784130402698570834024654748577491697818855443 rlim: 134000000 alim: 266000000 lpbr: 33 lpba: 31 mfbr: 96 mfba: 62 rlambda: 3.7 alambda: 2.7 Results from test sieving on the rational side with Q in blocks of 1000: Code: MQ Norm_yield Speed (sec/rel) 35 1812 0.499 40 2057 0.439 70 2238 0.447 100 2375 0.462 150 2442 0.476 200 2319 0.452 250 2159 0.489 300 2059 0.509 320 2058 0.511 Suggesting a sieving range for Q of 36-320M to generate 640M raw relations. Last fiddled with by swellman on 2022-03-07 at 14:37

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