20210828, 02:02  #3081 
Jun 2012
6247_{8} Posts 
Completed the 4050M range. Best cownoise score was 3.0276e16. Fairly blah.
Searching 5060M next. 
20210829, 05:42  #3082 
Aug 2020
79*6581e4;3*2539e3
418_{10} Posts 
Completed 6e67e6, best poly was 3.066e16 cownoise.
Seeing swellman's result, I'll stop the poly search now since it seems the 3.8e16 will be very hard to beat. I did 1e62e6 and 5e67e6. Btw, did you finish the range you did twice with different P? Last fiddled with by bur on 20210829 at 05:43 
20210829, 10:52  #3083 
Jun 2012
3239_{10} Posts 
If you’re asking me, the answer is yes but the results are spread over several pages of this thread. Summing up:
4041M w/P=10M, nq=6^6 gave a best poly of 2.709e16 per cownoise. 4041M w/P=20M, nq=6^6 gave a best poly of 2.578e16. 4041M w/P=10M, nq=6^7 gave a best poly of 2.898e16 and the 10th best poly scored 2.586e16. (All used incr of 4620 and adrange 4x that.) So nq=6^7 helped in this case, producing the highest scoring poly. But it took a week rather than a day and the results were still rather unimpressive. My current search of 5060M (P of 10M, nq is 6^6 and incr is 4620) should finish up on Wednesday. I’m prepared to search up to 300M but that will take a long time. 
20210829, 11:51  #3084  
Apr 2020
2^{2}·3^{3}·5 Posts 
Quote:
And about the "hard to beat" bit... Code:
n: 5272066026958413205513021090082556639441277154855572268239336980532402881465013381219738819137405617219594641652778228990107677072837959240400905630530715435664638237254654768053674178165309345879869729405448588458952991 skew: 331125.033 c0: 3394949349018158588040756570853974067801857 c1: 6653335906218714378144808303035495969 c2: 74040391174021644872973194328541 c3: 276448343494407068460138157 c4: 4606872840152057004918 c5: 1393805639345406 c6: 816114600 Y0: 226657691871392565816046108637660098 Y1: 69216809380453058295685069 Second place from 25M40M was Code:
n: 5272066026958413205513021090082556639441277154855572268239336980532402881465013381219738819137405617219594641652778228990107677072837959240400905630530715435664638237254654768053674178165309345879869729405448588458952991 skew: 259828.731 c0: 291564310755372745873385870920629996500880 c1: 11770010484070210819325995157141005616 c2: 804097425342022282773053964128739 c3: 1607028399777058166539822136 c4: 15556228087219154844031 c5: 1494532571792100 c6: 584942400 Y0: 237694813432371337441531043422949258 Y1: 47124166781711191105282781 

20210829, 12:56  #3085 
Apr 2010
11·17 Posts 

20210829, 16:33  #3086 
Apr 2010
11×17 Posts 

20210829, 22:22  #3087  
Jun 2012
41·79 Posts 
Quote:
For reasons of learning and stubborn pride, I’m going to finish my search range in a vain effort to improve on it. 

20210829, 23:18  #3088 
Apr 2020
2^{2}·3^{3}·5 Posts 

20210830, 18:09  #3089 
Aug 2020
79*6581e4;3*2539e3
2·11·19 Posts 
Oh, that's impressive... :D It did beat the RSA220 poly by 7.5%.
It was nice learning a lot about polynomial search. Now let Ryan Propper work his server farm magic. 
20210831, 03:33  #3090 
"Curtis"
Feb 2005
Riverside, CA
11711_{8} Posts 
Not just yet we have to pick sieve parameters first!
I used lpb0=34 and lpb1=35 for the GNFS207 team sieve two years ago, and both LP bounds were higher than they needed to be. I believe those are big enough for this job. The default C220 params file uses 500M/800M for lim's. Are those big enough? mfb0 should be testsieved at 666768, and mfb1 should be testsieved at 99100101102. I used 66 and 99 for the C207, but this job is over four times tougher so likely 67 and 100101 will be best. One of the CADO publications observed that a very large ncurves on the 2LP side helped, say 50 or 75 (again, testsieve?) ncurves1 of 20ish is likely fine (default is 21). We'd like to determine yield for a couple of test Q values, say at 100M intervals; once we estimate yield across the sieve region we can choose starting Q such that ending Q is expected to be 8 * starting Q. 
20210831, 14:32  #3091 
Apr 2020
2^{2}·3^{3}·5 Posts 
I'll do some testsieving.
Unsurprisingly, the 4.18e16 poly is clearly better than the 3.85e16 poly; I won't bother testing any of the others. 
Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Reserved for MF  Sequence 3366  RichD  Aliquot Sequences  529  20211105 17:27 
Reserved for MF  Sequence 276  kar_bon  Aliquot Sequences  136  20211021 16:17 
Reserved for MF  Sequence 3408  RichD  Aliquot Sequences  476  20211004 20:47 
Assignments are reserved but not showing up  prism019  GPU to 72  6  20200921 22:11 
80M to 64 bits ... but not really reserved  petrw1  Lone Mersenne Hunters  82  20100111 01:57 