20110411, 20:08  #45 
"Lennart"
Jun 2007
2^{5}×5×7 Posts 
That was a fun rally
I found more primes then expected. How many did you find on llrnet Lennart 
20110411, 21:46  #46 
Jan 2005
Sydney, Australia
335_{10} Posts 
I agree that race was close. I had an Intel quad 9450 drop out due to heat exhaustion overnight so its a warning it needs the dust bunnies cleaned out of the heat sink. Computer room got to 40C according to the max/min thermometer so the air con is back on (huh, global warming, bah its computer room warming!)
Nice gauntlet Lumiukko Takes me back a few years when you blitzed me in Riesel Sieve. Hey Gary, Kar_bon or Max how many work units do you need to crunch on "NotVeryManyPrimesLeftBehind" to find one now? I went the whole rally and didn't find one. 
20110411, 22:12  #47  
A Sunny Moo
Aug 2007
USA (GMT5)
6249_{10} Posts 
Quote:
Of course, note that this is just a statistical expectation based on an assumed random distribution of primes; in reality, while this model does fit quite nicely over the big picture, the specific distribution of primes can vary quite a bit. It has been my (and others') observation that primes tend to come in "bunches", i.e. there will often be dense clusters and large droughts rather than a more even distribution; though at this point there is no mathematical basis for this theory and it's just a popular "hunch". Assuming the "bunch theory" is true, then port 9000 happened to hit a few bunches and 3000 hit all the droughts in between. And since you happened to be on port 3000, you were out of luck (as was everybody else on 3000 except Gary and Karsten, who found one prime each and probably came out right on or just a little under the statistical expectation). 

20110412, 01:05  #48 
Mar 2006
Germany
2^{4}×5^{2}×7 Posts 
Here're some countings:
candidates tested all over: 235868  with PRPnet: 172365  with LLRnet: 63503 ... and it seems, Gary and I have found only 2 primes with LLRnet, the remaining 19 (if I counted right) with PRPnet. So 21 primes in about 230,000 pairs is in the range, Max said (one prime in 10,000 pairs). But 2 primes in 60,000 pairs is the old problem with them: estimated but not guaranteed! Nice work of all! Thanks. 
20110412, 02:26  #49 
Jan 2005
Sydney, Australia
5·67 Posts 
So I did approx 20,000 pairs to find no primes in this rally; need to run maybe another 10,000 pairs to try to stay on the average for port 3000.
I'm not giving up until I find one. 
20110412, 06:43  #50 
May 2007
Kansas; USA
2·5·1,013 Posts 
Why is this big deal being made by several people over PRPnet finding so many more primes than LLRnet? I recall a recent rally where it was just the opposite. It all evens out in the long run. It's just randomness.
Also, reference clumps followed by droughts and vice versa in something that is randomly distributed: In the famous words of one wellknown mathetmatician here: pure jibberish. A clump can be just as easily followed by another clump instead of a drought, which makes it even a larger clump. The same applies to droughts. Any attempt to start testing after a long drought in anticipation of a coming clump is akin to the gambler's fallacy. 
20110412, 06:44  #51  
May 2007
Kansas; USA
10011110010010_{2} Posts 
Quote:
Last fiddled with by gd_barnes on 20110412 at 17:01 

20110412, 09:30  #52  
Jan 2006
deep in a whileloop
658_{10} Posts 
Quote:
Using the new drives chart, I estimated there should be another 22ish primes left in this range between now and 1M. /edit  Make that 21 now that Ototero just got a lucky strike. So he's one up on us.. PS  The grapevine said Ototero was going on a trip / may have already left, so he may not be able to report it immediately although he said he should be able to get online at some points in his travel.  edit/ I'm quite impressed that I got the asynchronous JSON queries to work on the new Drives chart. And the colours are not always the same depending on which drive query finishes first. It gives a nice effect while the chart is building. I like it. I believe we are watching Drive#7 http://www.noprimeleftbehind.net/sta...drive_progress PS  Kudos to kar_bon for the drives table on his web site. Most helpful. Last fiddled with by AMDave on 20110412 at 09:32 

20110412, 15:15  #53 
Jan 2005
Sydney, Australia
5×67 Posts 
Dave that is a pretty chart!
Congrats to Ototero. Primes are scarce on port 3000 at the moment. Last fiddled with by vaughan on 20110412 at 15:16 
20110412, 17:05  #54  
May 2007
Kansas; USA
2·5·1,013 Posts 
Quote:


20110412, 17:09  #55  
A Sunny Moo
Aug 2007
USA (GMT5)
3×2,083 Posts 
Quote:
Last fiddled with by mdettweiler on 20110412 at 17:09 

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