20200114, 01:22  #1860 
Sep 2008
Kansas
2·7·227 Posts 
C157 poly
This is the best one I found using gpuMsieve from 100K2000K. Maybe Max can spin it.
Code:
n: 1654098853492103346196376991720302913598185971995257205318506082888090635219769665780186120626612175321809381513598017302609576486754505478164972380721171343 skew: 5051266.50 # size 3.239e15, alpha 8.487, combined = 2.250e12 rroots = 5 Y0: 1088781481752464879679018932184 Y1: 1603175637244477 c0: 274709378060763926117863209734254003555 c1: 906390434633835309135951338630819 c2: 74689696335285598434898491 c3: 115788873860120570579 c4: 1230131772166 c5: 1081080 
20200115, 05:47  #1861 
Mar 2016
2×29 Posts 
polys, polys
RichD,
Thank You for poly. Meanwhile I was pressing my poor Yafu, and got 'promising' e= 2.244e012 rroots 3. I'll push some more and we'll see. Anyway, many thanks RichD ! cubaq 
20200116, 14:52  #1863 
Mar 2016
2·29 Posts 
Source
It is HP10(1455). Regards, cubaq

20200119, 13:24  #1864 
Jun 2012
101101001101_{2} Posts 
C189 from AS 3366:i2206
Code:
171065344393143145598685691004020457412949305674191856490470856856353467726774164074336525717740050483725614204311545373938206064857869944567319589822085897560103957504493890195049294967729 If using msieveGPU, suggest searching in the range c5 > 25M. A sextic is unnecessary. As a point of reference, the record escore for a C189 is 2.078e14. All my machines are fully tasked now, but I will be able to contribute to this search in a few days. 
20200119, 19:23  #1865 
"Curtis"
Feb 2005
Riverside, CA
2^{2}·19·59 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 23 days. 
20200119, 19:50  #1866 
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 1.207054e18 alpha 8.735874 e 1.657e14 rroots 5 skew: 60255863.61 c0: 31381030369826867124034704635123263015800993960 c1: 4692867254516052130833152910480426027252 c2: 264647247134491241977409863094978 c3: 2527666462360009909489429 c4: 72673440232832010 c5: 322654800 Y0: 880815154646513541646481323093299959 Y1: 133978078624087050451 Last fiddled with by jagotu on 20200119 at 19:54 
20200119, 20:18  #1867 
Jun 2012
101101001101_{2} 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? 
20200119, 21:01  #1868  
Oct 2019
3×7 Posts 
Quote:
I do have GPUs, but unfortunately all are AMD, so no CUDA :( 

20200119, 21:45  #1869 
Sep 2008
Kansas
2×7×227 Posts 
C189 poly
I'll start at 32M with msieveGPU.

20200119, 22:26  #1870  
Jun 2012
11×263 Posts 
Quote:
Personally I don’t have much experience using msievecpu for poly searching, so I can’t be of much help. Sorry! 

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