20091110, 15:54  #67  
Jun 2003
Oxford, UK
2,039 Posts 
Quote:
I am running 2.5 cores approx on this exercise. 

20091110, 15:57  #68  
Jun 2003
Oxford, UK
2,039 Posts 
Quote:
There is a superior Riesel  see post of 29 Sept (Reisel) Regards Robert 

20091111, 10:32  #69  
Feb 2003
2^{7}×3×5 Posts 
Quote:
For the beginning I will take (according to your 24 Oct 09 post): S 58 from Iteration=0, i=98849 Will take more, once I got some feeling about the software (cpu and memory utilization, running times, ...) and the theory behind it. 

20091111, 12:14  #70 
Feb 2003
2^{7}·3·5 Posts 
After just two hours I already found some nice candidates:
S 201456540759 58 100/6929 105/10000 K=27547987231931215530195 S 581338538697 58 100/9084 105/10000 K=79494597599651554004685 S 2246005540369 58 100/8809 103/10000 K=307127937945434173384245 S 125445708657 58 100/9608 100/10000 K=17153956716241359070485 Now I caught fire... Also taking: S 60 from Iteration=0, i=24786 
20091111, 14:54  #71  
Jun 2003
Oxford, UK
3767_{8} Posts 
Quote:
When you post, don't forget to check your candidates against the original Sierpinski list which contains the cumulative list of 194 finds before Robert's software. Of the 4 you posted the first two are known 20145... is 152/137581 and 58133...is 118/25170. The other two are new. And I will add these to the master list of new finds and credit you. The duplication issue should cease once you are past the first 3 iterations for 58 and 60 given that the largest finds were 838422520523 for 58 and 933294678535 for 60. 4 in a couple of hours is awesome. My poor laptops and no electricity here in Bangladesh make for snaillike progress. Don't forget to save the record tables either. You have to check these every time you stop the program, otherwise you lose that record for ever. You never know, you might find an 16/16 in there. I am keeping records for each E level. 

20091112, 14:18  #72 
Feb 2003
2^{7}·3·5 Posts 
Okay, after one day I've got 23 VPS candidates for S 58, out of which (only) 4 were duplicates. So here are just the new ones (including the two reported yesterday):
S 52930116711 58 100/7489 104/10000 K=7237879563729757669155 S 125445708657 58 100/9608 100/10000 K=17153956716241359070485 S 251671885031 58 100/9867 100/10000 K=34414637764300621582755 S 1045666111343 58 100/8726 100/10000 K=142988639513076872029515 S 1461196621251 58 100/6837 105/10000 K=199809972482937566175855 S 1526585622539 58 100/8345 101/10000 K=208751530626465272827095 S 1712013118665 58 100/9006 103/10000 K=234107641063399884677325 S 1729977121403 58 100/9969 100/10000 K=236564111904189367255815 S 1780903684577 58 100/8389 102/10000 K=243528017403598252982085 S 1880663844267 58 100/9973 100/10000 K=257169627624053528204535 S 2166054501341 58 100/8704 101/10000 K=296195107499597269840305 S 2246005540369 58 100/8809 103/10000 K=307127937945434173384245 S 2354360292597 58 100/8357 101/10000 K=321944807726132334214185 S 2562085263199 58 100/9853 100/10000 K=350349965564828800966395 S 3241817377221 58 100/9958 100/10000 K=443299301077406965467705 S 3787165959141 58 100/7042 103/10000 K=517872485522463490009305 S 4392705084017 58 100/9672 100/10000 K=600676369763058021003285 S 4679042300103 58 100/9973 100/10000 K=639831285970023930669315 S 5622377417391 58 100/8369 101/10000 K=768826768909295041500555 Meanwhile I'm running all E<=106 (58, 60, 66, 82, 100, and 106) and will probably extend this to even higher ones during the weekend. Just one question about the in.txt file: I noticed that you (Robert) posted also some "near misses". So should I change the "vpscount" to somewhat lower than 100 (perhaps 95)? And another question: Do I need to check whether, let's say, a "S 58" may be already listed as a "S 60" (or higher) candidate? Will post more results (e.g. for S 60) soon... 
20091112, 15:34  #73  
Jun 2003
Oxford, UK
2,039 Posts 
I envy your processing power! Hail to thee!!! I will credit your results to the master list. We will get to 1000 new VPS quite quickly I think.
Quote:
Quote:
It is not so important for the racing tables if a y is not perfectly stated. There are only so many racing records, and values can be adjusted by hand if necessary. Last fiddled with by robert44444uk on 20091112 at 15:35 

20091112, 15:41  #74 
Jun 2003
Oxford, UK
2,039 Posts 
By the way, when we take these numbers to higher n, we need to do at least prp3 checking on the first 10000 n. Robert's program (I understand) gambles with prp1. It is worth noting that I have not found any count discrepancies between prp3 and prime, neither have I discovered any discrepancies between prp1 and prp3.
Also for lower n, we must recognise that k> 2^n and adjust tests accordingly for these low n. 
20091112, 15:45  #75 
Jun 2003
Oxford, UK
7F7_{16} Posts 

20091113, 11:10  #76  
Feb 2003
3600_{8} Posts 
Quote:
By factorizing the y values I've found that two of them are indeed candidates of the next higher E series (one 60 > 66, and the other one 66 > 82). They are indicated in the file (at the rightmost column). I was quite excited when I hit a "116/10000", but unfortunately this one was already discovered earlier (S 2158430601663 66). So the highest unknown one is a still quite nice 110/10000 (S 5475497492533 58). BTW.: I haven't found any VPS for E=130 and E=138 so far. I know that they become quite rare with increasing E. But I'm a bit concerned about the "smith_check" levels. Should I relax those constrains a bit? E.g. there is a Riesel 97/10000 candidate I found earlier, which would have been thrown out already at the "10 50" level but otherwise would have survived the "smith_check" at all other (higher) levels. Last fiddled with by Thomas11 on 20091113 at 11:12 

20091113, 13:13  #77 
Feb 2003
1920_{10} Posts 
I've just hit my first VPS for E=130:
S 179782224211057 130 100/7663 104/10000 K=11806316649721727826033357267756435645 iteration=62 I=82756 Fri Nov 13 12:30:36 2009 
Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Semiprime and nalmost prime candidate for the k's with algebra for the Sierpinski/Riesel problem  sweety439  sweety439  11  20200923 01:42 
Dual Sierpinski/Riesel prime  sweety439  Conjectures 'R Us  0  20161207 15:01 
Sierpinski/ Riesel bases 6 to 18  robert44444uk  Conjectures 'R Us  139  20071217 05:17 
Sierpinski/Riesel Base 10  rogue  Conjectures 'R Us  11  20071217 05:08 
Sierpinski / Riesel  Base 22  michaf  Conjectures 'R Us  49  20071217 05:03 