mersenneforum.org

mersenneforum.org (https://www.mersenneforum.org/index.php)
-   15k Search (https://www.mersenneforum.org/forumdisplay.php?f=16)
-   -   15k reservation (https://www.mersenneforum.org/showthread.php?t=3821)

gribozavr 2005-03-09 14:38

15k reservation
 
Hello!

I wanted to join 15k search and I selected 15k=1581823815 from [url]http://www.15k.org/homecandidate.htm[/url]. I didn't look into "I'd like to help" thread where cyrix's post about the reservation was. I've sent a message about the reservation to [email]15k@strikepoint.com[/email] on the 6th of March, but I got no response till now. I couldn't wait, and began sieving. I sieved the range 164000-220000. Then I bagan to do LLR tests. And I found a prime! It was 1581823815*2^165037-1. The first thing I did -- I googled for "1581823815 165037". And I was taken to 15k.org stats page. So, the prime was known! :confused:

So, the question is: how to reserve a 15k and to be totally sure that I will not do duplicate work? Why isn't [url]http://www.15k.org/homecandidate.htm[/url] updated? If it is really out of date, a message about could be placed on it, to avoid such confusion.

lsoule 2005-03-10 17:51

Another good place to check is at the top-5000
prime page at [url]http://primes.utm.edu/primes/search.php[/url]

That k has found these primes:
541 1581823815 · 2384095-1 115634
553 1581823815 · 2379422-1 114227
942 1581823815 · 2336542-1 101319
1395 1581823815 · 2287821-1 86652
1603 1581823815 · 2262774-1 79113
2226 1581823815 · 2229557-1 69113
2424 1581823815 · 2222451-1 66974
3924 1581823815 · 2197668-1 59514

Kosmaj 2005-03-11 05:03

The "homecandidate" page is really outdated but the neghbour page [URL=http://www.15k.org/stats.htm]Statistics[/URL] is relatively up to date. When reserving a certain k please to the following:
1) Check the above "Statistics" page
2) Search [URL=http://www.mersenneforum.org/showthread.php?t=792]I'd like to help[/URL] thread and [URL=http://www.mersenneforum.org/showthread.php?t=605]POST PRIMES you've found here[/URL] threads for your k.
3) Search the Top-5000 data-base using the link above for "k*2^%-1" replacing the k for its real value. Be sure to check the "all verified primes" box near the bottom of the page.
4) If nothing is found, announce your reservation in the [URL=http://www.mersenneforum.org/showthread.php?t=792]I'd like to help[/URL] thread.

And, good luck!

gribozavr 2005-03-11 14:04

Thanks everyone!
So, using the pages above I found a k with no primes known. :smile: I will post it to the "I'd like to help" thread.
BTW, I think that those links could be added to one of the "Instructions" sticky threads.


All times are UTC. The time now is 05:50.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.