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 2020-01-14, 01:22 #1860 RichD     Sep 2008 Kansas 1011100001012 Posts C157 poly This is the best one I found using gpu-Msieve from 100K-2000K. Maybe Max can spin it. Code: n: 1654098853492103346196376991720302913598185971995257205318506082888090635219769665780186120626612175321809381513598017302609576486754505478164972380721171343 skew: 5051266.50 # size 3.239e-15, alpha -8.487, combined = 2.250e-12 rroots = 5 Y0: -1088781481752464879679018932184 Y1: 1603175637244477 c0: 274709378060763926117863209734254003555 c1: 906390434633835309135951338630819 c2: 74689696335285598434898491 c3: -115788873860120570579 c4: -1230131772166 c5: 1081080
 2020-01-15, 05:47 #1861 cubaq     Mar 2016 23×7 Posts polys, polys RichD, Thank You for poly. Meanwhile I was pressing my poor Yafu, and got 'promising' e= 2.244e-012 rroots 3. I'll push some more and we'll see. Anyway, many thanks RichD ! cubaq
 2020-01-15, 21:49 #1862 Stargate38     "Daniel Jackson" May 2011 14285714285714285714 3·199 Posts Source of your number? @cubaq: How did you get that CF160? I can't seem to find a formula for it. Last fiddled with by Stargate38 on 2020-01-15 at 21:50 Reason: clarify
 2020-01-16, 14:52 #1863 cubaq     Mar 2016 3816 Posts Source It is HP10(1455). Regards, cubaq
 2020-01-19, 13:24 #1864 swellman     Jun 2012 53508 Posts C189 from AS 3366:i2206 Code:  171065344393143145598685691004020457412949305674191856490470856856353467726774164074336525717740050483725614204311545373938206064857869944567319589822085897560103957504493890195049294967729 It has withstood ECM up to 90% of t60, making it ready for GNFS. A poly is needed. Any search help is appreciated. If using msieve-GPU, suggest searching in the range c5 > 25M. A sextic is unnecessary. As a point of reference, the record e-score for a C189 is 2.078e-14. All my machines are fully tasked now, but I will be able to contribute to this search in a few days.
 2020-01-19, 19:23 #1865 VBCurtis     "Curtis" Feb 2005 Riverside, CA 59·71 Posts I'll run a CADO search using my usual settings. Mine are different enough that someone else could use the default settings if they'd like to contribute but don't have a suitable GPU for msieve poly searching. Should take 2-3 days.
 2020-01-19, 19:50 #1866 jagotu   Oct 2019 3·7 Posts I've been trying to contribute but so far the poly select is what I understand the least of the whole factoring ordeal. I ended up running 8 msieves, splitting the default msieve range to 8 parts and running something like Code: ./msieve -v -s msieve0 -np polydegree=5 poly_deadline=0 min_coeff=0 max_coeff=107509504 . Is that a good way to contribute? I thought msieve will be selecting the leading coefficient randomly from assigned range, but to be honest it seems kinda sequential to me. Anyway, the best poly I was able to find so far is this: Code: # norm 1.207054e-18 alpha -8.735874 e 1.657e-14 rroots 5 skew: 60255863.61 c0: 31381030369826867124034704635123263015800993960 c1: 4692867254516052130833152910480426027252 c2: -264647247134491241977409863094978 c3: -2527666462360009909489429 c4: 72673440232832010 c5: 322654800 Y0: -880815154646513541646481323093299959 Y1: 133978078624087050451 Thanks for any hints and/or recommended reading on how to better contribute :) Last fiddled with by jagotu on 2020-01-19 at 19:54
 2020-01-19, 20:18 #1867 swellman     Jun 2012 23·349 Posts msieve -h is instructive. I’m no master of msieve, but if you specify the search range in msieve it does work the range sequentially. Looks as though you are using Linux, do you have a GPU?
2020-01-19, 21:01   #1868
jagotu

Oct 2019

2110 Posts

Quote:
 Originally Posted by swellman msieve -h is instructive. I’m no master of msieve, but if you specify the search range in msieve it does work the range sequentially. Looks as though you are using Linux, do you have a GPU?
msieve -h is pretty instructive about the specific details of running it, but not really when it comes to the big picture - basically what goes into making it work effectively, and what's the best way to split work.

I do have GPUs, but unfortunately all are AMD, so no CUDA :(

 2020-01-19, 21:45 #1869 RichD     Sep 2008 Kansas 1011100001012 Posts C189 poly I'll start at 32M with msieve-GPU.
2020-01-19, 22:26   #1870
swellman

Jun 2012

279210 Posts

Quote:
 Originally Posted by jagotu msieve -h is pretty instructive about the specific details of running it, but not really when it comes to the big picture - basically what goes into making it work effectively, and what's the best way to split work. I do have GPUs, but unfortunately all are AMD, so no CUDA :(

Personally I don’t have much experience using msieve-cpu for poly searching, so I can’t be of much help. Sorry!

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