20220128, 01:51  #12 
Apr 2020
5^{2}×37 Posts 

20220128, 02:28  #13 
Sep 2008
Kansas
3,803 Posts 
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.

20220128, 02:48  #14  
Jun 2012
3,847 Posts 
Quote:


20220128, 03:32  #15 
"Curtis"
Feb 2005
Riverside, CA
12776_{8} Posts 
I think it should be a geometric average, which would land notmuchhigher 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.

20220128, 13:42  #16 
Apr 2020
925_{10} Posts 
I've only ever run one sizeable job with lpbs skewed by 2, which was a difficulty229 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.

20220203, 13:27  #17 
Jun 2012
3,847 Posts 
QUEUED AS 5m3_425
53,425 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 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 Last fiddled with by swellman on 20220217 at 13:41 
20220204, 06:06  #18 
"Curtis"
Feb 2005
Riverside, CA
1010111111110_{2} Posts 
619M relations got me a 31.7M matrix, 34M 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.

20220219, 01:27  #19 
May 2009
Moscow, Russia
2^{3}×19^{2} Posts 
QUEUED AS C191_933436_12595
C191 from 933436:i12595 for 15e queue. Thanks Gimarel for the ploy! Code:
n: 95943792139492908765333071790605979163835027624974805898350717773405577196123295473856044969264458190095842686539462763700839439312300013661751809241655826533008542372113621303929192489690417 # norm 1.457307e18 alpha 8.343892 e 1.949e14 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 Last fiddled with by swellman on 20220219 at 02:20 
20220303, 22:34  #20 
Sep 2008
Kansas
EDB_{16} 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 specialQ range is about the same. Estimate of 625M raw relations. Code:
n: 456144099782224315696824095020150332081139148797304856352191816675514369613259984102145549799476807322037325051749567250153209607473297001774552409742710930294846495418796912917131669944275190656583437621142715383063574336648632009217696108548318826496061 # 331^1091, 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 Trial sieving 5K blocks. Code:
Q Yield 40M 15514 70M 14241 100M 14472 200M 12038 280M 10788 Last fiddled with by swellman on 20220304 at 12:11 
20220304, 19:16  #21 
Jun 2012
3,847 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 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 Last fiddled with by swellman on 20220304 at 19:29 
20220307, 13:19  #22 
Jun 2012
F07_{16} Posts 
QUEUED AS 9m5_625M
95,625M 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 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 Last fiddled with by swellman on 20220307 at 14:37 
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