mersenneforum.org  

Go Back   mersenneforum.org > Prime Search Projects > Conjectures 'R Us

Reply
 
Thread Tools
Old 2021-02-12, 13:31   #892
rogue
 
rogue's Avatar
 
"Mark"
Apr 2003
Between here and the

22·3·523 Posts
Default

Quote:
Originally Posted by gd_barnes View Post
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!
rogue is offline   Reply With Quote
Old 2021-02-12, 15:16   #893
masser
 
masser's Avatar
 
Jul 2003
wear a mask

2×5×157 Posts
Default

Quote:
Originally Posted by gd_barnes View Post
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?
masser is offline   Reply With Quote
Old 2021-02-12, 22:01   #894
gd_barnes
 
gd_barnes's Avatar
 
May 2007
Kansas; USA

25·17·19 Posts
Default

Quote:
Originally Posted by masser View Post
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
gd_barnes is offline   Reply With Quote
Old 2021-02-15, 03:21   #895
gd_barnes
 
gd_barnes's Avatar
 
May 2007
Kansas; USA

25·17·19 Posts
Default

...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!
gd_barnes is offline   Reply With Quote
Old 2021-02-15, 07:02   #896
LaurV
Romulan Interpreter
 
LaurV's Avatar
 
Jun 2011
Thailand

22×2,341 Posts
Default

Quote:
Originally Posted by gd_barnes View Post
9221*2^11392194-1 is prime!!
Quote:
Originally Posted by gd_barnes View Post
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
LaurV is offline   Reply With Quote
Old 2021-02-15, 10:59   #897
gd_barnes
 
gd_barnes's Avatar
 
May 2007
Kansas; USA

241408 Posts
Default

Quote:
Originally Posted by LaurV View Post
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.
gd_barnes is offline   Reply With Quote
Old 2021-02-15, 13:17   #898
kar_bon
 
kar_bon's Avatar
 
Mar 2006
Germany

B4116 Posts
Default

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.
kar_bon is offline   Reply With Quote
Old 2021-02-15, 18:08   #899
ryanp
 
ryanp's Avatar
 
Jun 2012
Boulder, CO

1000101002 Posts
Default

Quote:
Originally Posted by kar_bon View Post
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.
ryanp is offline   Reply With Quote
Old 2021-02-15, 19:59   #900
rogue
 
rogue's Avatar
 
"Mark"
Apr 2003
Between here and the

22·3·523 Posts
Default

Quote:
Originally Posted by ryanp View Post
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.
rogue is offline   Reply With Quote
Old 2021-02-15, 20:34   #901
ryanp
 
ryanp's Avatar
 
Jun 2012
Boulder, CO

22·3·23 Posts
Default

Quote:
Originally Posted by rogue View Post
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?
ryanp is offline   Reply With Quote
Old 2021-02-15, 20:39   #902
rogue
 
rogue's Avatar
 
"Mark"
Apr 2003
Between here and the

627610 Posts
Default

Quote:
Originally Posted by ryanp View Post
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.
rogue is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Report top-5000 primes for all k<=1001 gd_barnes No Prime Left Behind 1499 2021-03-30 22:04
Report top-5000 primes for k=1003-3000 gd_barnes No Prime Left Behind 688 2020-04-24 07:31
All top 5000 primes will have the same number of digits in 2014 ;-) Batalov Conjectures 'R Us 10 2013-03-29 01:29
Twenty Oldest Primes on Top 5000 List masser Lounge 9 2008-08-27 12:31
get all the 5000 biggest primes above 100K digits jasong jasong 1 2007-06-09 22:51

All times are UTC. The time now is 10:41.

Sun Apr 11 10:41:58 UTC 2021 up 3 days, 5:22, 1 user, load averages: 1.67, 2.01, 2.12

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.