20181129, 06:42  #1475 
"Curtis"
Feb 2005
Riverside, CA
2×2,333 Posts 
Thanks! I'll play with parameters and testsieving this weekend. That's exactly what I was looking for.

20181201, 01:17  #1476 
"Victor de Hollander"
Aug 2011
the Netherlands
2230_{8} Posts 
(7+3_320)
C146 cofactor of 7^320+3^320
factors as: Code:
67927455718198283636176484354385744910102330009568394787201 149835959796840893864901412996722137788935475049509309358722225494196555408180318836481 
20181201, 20:13  #1477  
"Curtis"
Feb 2005
Riverside, CA
2×2,333 Posts 
Quote:
I have the job running 6threaded on a 6core i7 already running 5xLLR; it'll take about 3 weeks. That's roughly the time a GNFS159 would take, so SNFSoctic175 is about 4 times faster than GNFS on the 169digit cofactor would be. Last fiddled with by VBCurtis on 20181201 at 20:16 Reason: added GNFS timing comparison 

20181202, 11:18  #1478  
Aug 2005
Seattle, WA
2·7^{2}·17 Posts 
Quote:


20181202, 11:28  #1479 
Aug 2005
Seattle, WA
2×7^{2}×17 Posts 
Here is another update. The following are the factors reported to me after the last update, on November 25, and through November 29. The website has been updated with all of this information, as have the ECMnet server and the reservation service. The latter two have already received new factors since November 29, which will appear in the next update.
Note that several factors have been found by ECM with digit counts in the mid40s, which has a couple of implications: 1) It is still possible to find factors with relatively little work, and 2) if you reserve a number to factor with NFS, it's probably worth doing a little bit of ECM pretesting on it first. As of this update, there are 1543 remaining composites in the tables. Code:
7+2 310 C200 29134931330309568622103968590078395459674981. C156 Yoyo@home ECM 20181126 7+3 310 C203 598472194454145810791374307259248817401571536826721. C153 Yoyo@home ECM 20181126 4+3 430 C190 2229977176585304380126731403691264471606410841587090556579661968447464401581. P115 NFS@Home & C Pinho SNFS 20181126 98 293 C191 723145398456951021234124546371594856132040287. C146 J Becker ECM 20181126 32 553 C186 5878835902694438711232695492067440867713869282016421929. P132 NFS@Home & C Pinho SNFS 20181127 9+2 642L C174 4763958967873367046955107358012058628975182025840010625988089100689827917953392393. P92 T Womack SNFS 20181127 4+3 1179M C228 29362818556358856328925701147565530984150191644710917015380500680509412691563331851375698719296383944756406341. P118 NFS@Home & D Domanov SNFS 20181128 
20181205, 05:18  #1480  
"Curtis"
Feb 2005
Riverside, CA
2·2,333 Posts 
Quote:
I've restarted the job with alim=rlim=134M, and 32LP. I'll let it run a day or two and compare to previous GNFS170ish results to see if this octic is usable over a GNFS169 job. I also tried continuing the job with 15e rather than 14e, but the same parameters. sec/rel more than doubled, while yield only increased to 1.4 (sample size 6x1k blocks while running factmsieve.py). My testsieving covered 1k blocks for half a dozen Q's spread out every ~10M from 8M to 80M, similar to what I usually do. I'm perplexed at this job! 

20181206, 14:19  #1481  
Just call me Henry
"David"
Sep 2007
Cambridge (GMT/BST)
2·2,909 Posts 
Quote:


20181209, 17:19  #1482 
"Victor de Hollander"
Aug 2011
the Netherlands
2^{3}×3×7^{2} Posts 
11^275+7^275 C138 factored
11^275+7^275 C138 cofactor
Code:
215290482711498775857088271400131320612386268382231605142383940593392584190741166564737484238337228384236630964779465097892248827664917851 Code:
769488969375648107454325012985724492433629702550798762063554301 279783715270385575493842065372546994941075034967188989299578239204825098551 Last fiddled with by VictordeHolland on 20181209 at 17:19 
20181210, 21:56  #1483 
"Victor de Hollander"
Aug 2011
the Netherlands
2^{3}·3·7^{2} Posts 
11^2753^275 factored
11^2753^275 cofactor C138:
Code:
241481114627197655636802482519133477747496502185637414625282276645257607743867204318972229839736875975257161324043742089143818591829941851 Code:
15648945542413790506692686405071747793299998966299058674551 15431142882611764104799599868091290208101320825352712829426141652166746229802301 
20181216, 15:03  #1484 
"Rich"
Aug 2002
Benicia, California
2267_{8} Posts 
9^309+8^309 factored
C138 cofactor of 9^309+8^309:
Code:
prp50 = 21390575396786807527427938316788563378837175111963 prp87 = 546813687095488247919565776474836286417700363251587105783514743124253662225974433054361 
20181226, 21:46  #1485 
May 2009
Russia, Moscow
2535_{10} Posts 
74_363
Code:
prp51 = 116130016461076358928258030747660632445330488879047 prp75 = 189357921726768473176299533767403621078151712802326821469437589347998318431 Code:
prp74 = 78309889959047816864609410444547746953366914584525493299091945867833525691 prp51 = 326314837717229390627350996286816552471339095832051 
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