20181210, 03:27  #23  
Serpentine Vermin Jar
Jul 2014
2·1,637 Posts 
Quote:
The details of hiding the discovery until it was verified and ready to be announced has evolved to the point where nowadays most of the clues have come from people who know the exponent (because they're doing validation runs or whatever) and leak out enough info that guessing the exponent has become almost trivial. I suppose the best clues for me would be the ones that require people to do a little mathystuff to figure it out, but are also general enough that it's not actually giving it away, but rather just narrows it down a bit. Like knowing whether exponent mod 4 is a 1 or a 3 ... narrows it down by half. LOL Or knowing that it's also exponent mod 8 = 5. Of the known Mersenne primes, those 2 factoids account for 11 of the 50 (51 if we count the new one) ... 21.6%. For the entire set of prime exponent candidates from 2 through 1e9 there are 25% meeting that criteria so we're underperforming a bit there. Of course we'll still get the people who complain that it takes too long between initial discovery and the press release going out, but whatever. These things take time...it has to be verified, George has to put together the PR stuff and use his contacts to get the word out, plus there is the timing of making the announcement when it's optimal and won't be buried in other news. The aim of the PR is not only to announce it but also draw some attention to the project to get more participation, hopefully. After previous discoveries, there's a sharp uptick in people using the software although it tends to taper back down. Still, there are some who hear about it, think it's cool, and stick around at least long enough to do some solid tests. With all the recent improvements in the code in just the past year, I think the extra attention would be great for people who may not be aware of those additions (PRP, the new error checking methods like Gerbicz and Jacobi, enhancements for newer CPUs and multithreading benchmarks, etc) 

20181210, 04:00  #24  
Serpentine Vermin Jar
Jul 2014
2·1,637 Posts 
Quote:
From there you might be able to narrow it down to assignments made within the past XX days (bearing in mind, some exponents are assigned well in advance and just take a while to even start, much less the time it takes to complete). But still, you might get it narrowed to a few hundred. Anyway, so, you kind of see how the game is played. 

20181210, 04:31  #25 
Jul 2009
Germany
2^{3}·43 Posts 
Congratulations, hopefully it is also the largest currently known prime number

20181210, 04:47  #26 
Jun 2003
2×3^{4}×29 Posts 
That was not the point. The point is, nobody will look for a prime, because there are no more indications on the server that a prime was reported. You can't guess something, if you don't know that there is a "something" to guess.

20181210, 04:55  #27  
Serpentine Vermin Jar
Jul 2014
CCA_{16} Posts 
Quote:
The reason it's hidden on the server from the start is because we've had a history of false positives. Most of them lately have been from a funny version of cudalucas 2.05.1 but there have been others. Couple years back a user was reporting quite a few of them from one of his machines, and earlier this year there was a false positive from a doublecheck in the 4748M range or something like that. By waiting until we've at least made sure it's not bogus, we cut down the noise. If people saw all of the false alarms it wouldn't be nearly as fun when the real thing happens. You're welcome. LOL 

20181210, 05:00  #28 
Jun 2003
2×3^{4}×29 Posts 
Right. Which led to...
So, the answer to that is a "yes", I guess. 
20181210, 05:28  #29 
Serpentine Vermin Jar
Jul 2014
2×1,637 Posts 

20181210, 05:45  #30 
"Rashid Naimi"
Oct 2015
Remote to Here/There
7×271 Posts 
I found the detective work very satisfying last time.
Thank you for making math fun. BTW Anyone looking for Twins this time around? That could end up being a clue. 
20181210, 09:04  #31 
Just call me Henry
"David"
Sep 2007
Cambridge (GMT/BST)
13132_{8} Posts 
Is it prime or prp currently? This could the first using the new testing methodology

20181210, 10:17  #32 
Romulan Interpreter
Jun 2011
Thailand
2^{3}×1,093 Posts 
Sorry I lost the "start" of the thread. Congrats to the finder.
If the offer for DC still stands, I can put one card on it (say ~120 GHzD/D card). (Edit: contrary to other "competitors" here, people know that I always run CL in two cards in parallel, with different shifts, so any mismatch or false residue is excluded). (Edit 2: and yes, that is ~240 GHzD/D totally). Last fiddled with by LaurV on 20181210 at 10:22 
20181210, 13:13  #33 
Jun 2003
2·3^{4}·29 Posts 
What is the progress/ETA on the verification runs?
And, what is the plan on the press release? Prechristmas or post new year? 
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