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2021-02-12, 13:31   #892
rogue

"Mark"
Apr 2003
Between here and the

7·29·31 Posts

Quote:
 Originally Posted by gd_barnes Big news from PrimeGrid: 9221*2^11392194-1 is prime!! See: https://primes.utm.edu/primes/page.php?id=131777 This was the 2nd smallest k remaining on the Riesel base 2 effort. Only k=2293 remaining is smaller. Even better news: It knocks out the same CRUS k remaining for both R2 and R4! It is also far bigger than the previous largest R4 prime. :-) A hearty congrats to PrimeGrid!

2021-02-12, 15:16   #893
masser

Jul 2003

19×83 Posts

Quote:
 Originally Posted by gd_barnes Big news from PrimeGrid: This was the 2nd smallest k remaining on the Riesel base 2 effort. Only k=2293 remaining is smaller.
Awesome news. How many k remain for the Riesel problem? 48, 49?

2021-02-12, 22:01   #894
gd_barnes

May 2007
Kansas; USA

3×3,449 Posts

Quote:
 Originally Posted by masser Awesome news. How many k remain for the Riesel problem? 48, 49?
47 remain for the original Riesel problem.

Here it is 49 remaining including the two even k's.

Last fiddled with by gd_barnes on 2021-02-12 at 22:01

 2021-02-15, 03:21 #895 gd_barnes     May 2007 Kansas; USA 3×3,449 Posts ...and just like that... Even bigger news from Ryan Propper: 2293*2^12918431-1 is prime!! See: https://primes.utm.edu/primes/page.php?id=131882 So...within less than a week of each other PrimeGrid and Ryan have knocked out the two smallest k's remaining on the Riesel base 2 effort. Even better news: It also knocks out CRUS k=4586 for R4 and k=18344 for R16! Congrats to Ryan!
2021-02-15, 07:02   #896
LaurV
Romulan Interpreter

Jun 2011
Thailand

2·3·5·313 Posts

Quote:
 Originally Posted by gd_barnes 9221*2^11392194-1 is prime!!
Quote:
 Originally Posted by gd_barnes 2293*2^12918431-1 is prime!!

YAY! That's indeed news! Big congrats to the finders!

Is somebody still updating Mr. Keller's pages? Were they announced?
I see none of them in his status page, and Ryan's result is so new didn't make it yet into the PG status page. Or was Ryan working independently, and scared the heck out of PrimeGrid?

Last fiddled with by LaurV on 2021-02-15 at 08:02

2021-02-15, 10:59   #897
gd_barnes

May 2007
Kansas; USA

1034710 Posts

Quote:
 Originally Posted by LaurV YAY! That's indeed news! Big congrats to the finders! Is somebody still updating Mr. Keller's pages? Were they announced? I see none of them in his status page, and Ryan's result is so new didn't make it yet into the PG status page. Or was Ryan working independently, and scared the heck out of PrimeGrid?

They are probably so new that they haven't been announced yet.

As best as I can tell Ryan works entirely independently of any project. None of his proof codes at top-5000 have a project ID in them.

To my knowledge Prof. Keller updates his own pages and continues to do so. The last update dates on many of them were early in February so very recent. I'm confident that he will update them when these finds are formalized.

 2021-02-15, 13:17 #898 kar_bon     Mar 2006 Germany B4216 Posts The Wiki contains a page for the Riesel problem and also for the Prime Grid project. k=2293 is still shown for the project, because it's not known, if there exists a smaller prime for that k-value. Ryan Propper do not publish any ranges he's doing in any of his searches. This will keep gaps in search ranges like for k=2293. I also can not create a history (others than on W.Kellers page), only the primes found are noticeable.
2021-02-15, 18:08   #899
ryanp

Jun 2012
Boulder, CO

277 Posts

Quote:
 Originally Posted by kar_bon k=2293 is still shown for the project, because it's not known, if there exists a smaller prime for that k-value. Ryan Propper do not publish any ranges he's doing in any of his searches.
I am searching 12M <= n < =15M for a few k's.

2021-02-15, 19:59   #900
rogue

"Mark"
Apr 2003
Between here and the

11000100101012 Posts

Quote:
 Originally Posted by ryanp I am searching 12M <= n < =15M for a few k's.
As you probably know someone over at PrimeGrid has accused you of poaching. Not knowing the history I have no opinion on whether or not poaching occurred here.

2021-02-15, 20:34   #901
ryanp

Jun 2012
Boulder, CO

277 Posts

Quote:
 Originally Posted by rogue As you probably know someone over at PrimeGrid has accused you of poaching. Not knowing the history I have no opinion on whether or not poaching occurred here.
I was not aware, but am not particularly surprised. As it happens, I tried to pick a range that I thought was disjoint from what PG was searching. /shrug

Presumably they can reallocate the resources to searching on the other k's, no?

2021-02-15, 20:39   #902
rogue

"Mark"
Apr 2003
Between here and the

142258 Posts

Quote:
 Originally Posted by ryanp I was not aware, but am not particularly surprised. As it happens, I tried to pick a range that I thought was disjoint from what PG was searching. /shrug Presumably they can reallocate the resources to searching on the other k's, no?
Since they do not have any residues for the n smaller than the one that yielded a prime they will search the n below that prime that have not been tested.

Out of curiosity did you do your own sieving or did you use the file they have? If you did your own sieving, then AFAIAC, it is sour grapes on their part. I'm sure that you had the best of intentions, but I'm also certain that PrimeGrid would not have relinquished any tests to someone else once they believed that they had control over the search.

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