20220411, 14:19  #1 
Jun 2012
2^{3}·5·7·13 Posts 
XYYXF Status Update
It’s been a long time since Andrey posted anything here, so it’s time for a 1 < y < x < 151 XYYXF factoring project update.
 There remain 323 composites left to be factored in the project. All have survived at least 18000 curves @B1=110e6 (t55).  10 of these are C300+, all of which have survived ECM to t65+. Greg Childers has agreed to run C311_148_133 on the big siever of NFS@Home late in 2022.  3 composites are undoubtedly best factored using GNFS, again all of which have completed ECM. One of these, C203_145_119, is currently being sieved on 16e. I hope to get the remaining two GNFS jobs (C203_147_104 and C204_147_118) factored by the end of the year (or at least enqueued in 16e). For the past several years I’ve been feeding ECM tasks to Yoyo@Home and occasionally running NFS once ECM was completed. Progress has been very slow, even with the power of BOINC. In the past, Andrey would feed the entire list of composites into Yoyo’s queue and wait for it to finish, then repeat at the next tlevel. But this approach won’t work anymore, as t60 requires ~42,000 curves @B1=260e6 and Yoyo has a maximum limit of 20,000 curves on a single task (limit is 9,900 curves @B1=850e6 or higher). Running three rounds of 14,000 curves could work but that approach would take many years to finish. Running two rounds of 20,000 curves plus some local ECM is still daunting. Lately I’ve been running ECM in smaller batches, trying get a handful of XYYXF composites ready for NFS. Then I’ll repeat the process. Right now I’m working to get the 7 least difficult jobs remaining (SNFS 267270) through ECM. Hoping to see the ECM finished by late 2022. If anyone is reading this, please give feedback. XYYXF factoring has been a lonely space! 
20220411, 16:44  #2 
Bamboozled!
"𒉺𒌌𒇷𒆷𒀭"
May 2003
Down not across
11×1,039 Posts 

20220411, 19:45  #3 
"Curtis"
Feb 2005
Riverside, CA
2^{2}·3·449 Posts 
I'm game to do a little ECM to help you get individual candidates ready for NFS.
"A little" to me is something like 2000 curves at 85e7 or 12e8. I prefer to do fewer curves at higher bounds to "take a shot" at finding a bigger factor, as opposed to finishing off a t60 with B1=26e7. I just received a 5950X that I'll assemble next week, so I'll have a bunch of new compute capacity. I also have some interest in running CADO with I=17 on small qvalues as a way to boost / expand the range of NFS@home jobs. If we can gather, say, 10% of the total relations via I=17 CADO for a job we can reduce the Qrange for NFS@home by 5% or more. I doubt that C311 is big enough to need that, but maybe we try it out this summer on this XYYXC311 to test tools etc before we rely on a CADO17 / nfs@home combo for a really tough job like a GNFS225+. 
20220411, 20:14  #4  
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
2^{2}×2,477 Posts 
Quote:
Prior to that, it was widely thought that Belarus was a haven for IT folks/scientists. Andrey is a Chemistry teacher (professor?) and a computational chemistry scientist. His birthday is coming up in a few weeks. He has not been active in Facebook for a year or more. 

20220412, 13:23  #5  
Jun 2012
2^{3}×5×7×13 Posts 
Quote:
Quote:


20220412, 13:25  #6  
Jun 2012
2^{3}×5×7×13 Posts 
Quote:
I hope he and his are well. 

20220412, 15:57  #7 
"Curtis"
Feb 2005
Riverside, CA
12414_{8} Posts 
What I had in mind for ECM was any composite that you were personally taking from whatever level Yoyo did to "ready for NFS@home". If I do something like 1000 @65e7 and 800 @ 12e8 for each job as you get to it, I'll speed your efforts and together we feed the 15e queue a bit faster. Those curve counts are roughly equivalent to 6000@26e7 as far as "how much of a t60".

20220412, 16:43  #8 
Jun 2012
Boulder, CO
3·137 Posts 
Do you have a link to these 323 composites? I can hit them with some ECM at B1=26e7 or perhaps 85e7.

20220412, 17:25  #9  
Jun 2012
2^{3}·5·7·13 Posts 
Quote:
But the next batch on my list are 4 composites of SNFS 270. Can you run 1000 @65e7 and 800 @12e8 on these? Your efforts would greatly speed thing up. Code:
C217_146_130 2273736614959600102299788369214860151882556046845135920321491916509566649822233346525551566590304365550486243473007049647802844778464741732324121635941624450635826410351378351500756252260898809587472865957974314446269 C214_139_87 4195620243915888279671778712345331475268709716797825786349176460911223003450368828626222652158705793360957647290504936745524043932410659915735237866241362258201645994955743683282475290187203096154867195374771993153 C222_141_82 205268521474284689311496808503122136985981225012537353959393016862115907865885179677284356635128069465482618285245343279948507532199640274072355307560636501254976877515298927864568411335060366559573631938887842066290994757 C213_146_132 893056777816347198729161218297917289911779059070888373649385608058717811758800548718293627086572394372637058444446373481226457729536964989297099024892946685162728665191417684132376902310624589757129442005764041901 Quote:
If you can keep me advised on # of curves and B1 values run it would be greatly appreciated! 

20220412, 18:15  #10 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
2^{2}×2,477 Posts 
Tom Womack had a nice reservation/status interface for Hom.Cunninghams. That approach could be refactored for the simple list of the 323orbust and bookkeeppiing, maybe

20220412, 20:34  #11  
Jun 2012
111000111000_{2} Posts 
Quote:
But I’ll put up the flat text file later tonight, regardless. 

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