20140929, 14:49  #375 
Jun 2009
1010011110_{2} Posts 

20140930, 03:57  #376 
"Phil"
Sep 2002
Tracktown, U.S.A.
1,117 Posts 
Very nice, congratulations, Peter! Congratulations as well to Marcel for some very impressive improvements to Primo. This number is now the eighth largest ECPP, Peter's result from last December which was then the third largest is now the seventh, and Primo has now proven 6 out of the 8 top ECPP results, including the second largest, which is also the largest proven Wagstaff prime.
The next three probable primes on the list (see post #1 in this thread) have 31237, 31336, and 31846 digits respectively, and are considerably larger than the current ECPP record of 26643 digits. Probably too soon to tackle these yet, but I expect they will be proven in a few years. If anyone checks to see how the current version of Primo does on any of these, a report would be welcome. 
20140930, 15:08  #377  
Jun 2009
2·5·67 Posts 
Quote:
EDIT: found his mail, the limit is 99648 bits Last fiddled with by PuzzlePeter on 20140930 at 15:09 

20140930, 16:28  #378 
"Dana Jacobsen"
Feb 2011
Bangkok, TH
905_{10} Posts 
Congrats!
When I started my P18689 in Sep 2013, it would have been the largest Primo result. It took 3 months with Primo 4.0.1 + 4.0.4 on a 3930K (12 threads, which is faster on that machine than 6  perhaps faster memory), and ended up 2nd behind Peter when it finished, and is now 11th. That's my main dev machine so ran lots of xterms plus a few other programs at the same time though nothing very long running. I also had a fun scare a couple months in when another process filled the disk and Primo crashed, losing all the data. Daily backups to the rescue. 
20140930, 17:09  #379 
Jun 2009
29E_{16} Posts 
LOL I know that feeling! Had the "no space left on device" problem after about 1500 tests. PRIMO crunched on, but the files had 0 bytes. Then, in phase 2, the next shock. Every test needs 3 steps in phase 2 "building polynomial", "factoring polynomial" and "computing curve and point". I never noticed the first one, because it takes so little time. But one test spent more than 10 hours on "building polynomial". I thought it had crashed or maybe the intermediate file was corrupt. But on the next morning it had moved on...
This is most probably the end of my XXL PRIMO test series. Let's wait for Paul to finish his monster and then let's see what will happen. 
20140930, 21:20  #380 
Just call me Henry
"David"
Sep 2007
Cambridge (GMT/BST)
2·2,861 Posts 
Is there a particular reason why the latest versions of fastecpp are not available?

20141231, 11:46  #381 
"Phil"
Sep 2002
Tracktown, U.S.A.
1,117 Posts 
Now that Primo has proven a new ECPP record at 29271 digits, our next three numbers (31237 to 31846 digits) don't seem that far from possible. It will be interesting to see how long the new record stands. The current Primo limit is 29998 digits, so the program has now worked successfully close to this limit.

20141231, 12:48  #382  
Jun 2009
2×5×67 Posts 
Quote:


20161230, 23:27  #383 
Jan 2005
Minsk, Belarus
2^{4}×5^{2} Posts 
Any reservations for ECPP?

20190228, 09:48  #384  
Banned
"Luigi"
Aug 2002
Team Italia
2·2,383 Posts 
Quote:


20190301, 00:46  #385 
Feb 2019
2·3·5 Posts 

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