mersenneforum.org

mersenneforum.org (https://www.mersenneforum.org/index.php)
-   No Prime Left Behind (https://www.mersenneforum.org/forumdisplay.php?f=82)
-   -   Report top-5000 primes for all k<=1001 (https://www.mersenneforum.org/showthread.php?t=9891)

mdettweiler 2014-03-27 03:36

[url=http://primes.utm.edu/primes/page.php?id=117496]849*2^1301920-1[/url] is prime (port 2000/14th drive)

Mini-Geek 2014-04-02 15:12

[URL="http://primes.utm.edu/primes/page.php?id=117543"]513*2^1318074-1 is Prime![/URL] (396783 digits, entrance rank 1662)

I had the worst luck leading up to this prime! I've tested 69809 candidates [URL="http://noprimeleftbehind.net:9000/all.html"]on G9000[/URL], and this is the only prime. I calculate that, just from the 58784 G9000 candidates that I have local logs on, I should have found about 4.67 primes. The odds of at least one prime was ~99.06%, but I was unlucky enough to reach that <1% chance before finding a prime. It was such an extreme drought that I actually ran Prime95 as a torture test a couple of times to make sure I wasn't missing them due to a fault of my own.
This is my first top-5k prime [URL="http://primes.utm.edu/primes/page.php?id=99786"]since 2011-04-20[/URL], mostly due to me doing other work (GIMPS, factoring, etc.) and partly due to the aforementioned bad luck.

gd_barnes 2014-04-03 06:34

That ends a huge drought for that entire drive. Congrats and sorry you had such back luck!

Mini-Geek 2014-04-05 12:53

[URL="http://primes.utm.edu/primes/page.php?id=117554"]411*2^1318421-1 is Prime![/URL] (396887 digits, entrance rank 1664)

Sometimes lightning strikes twice. This was found just 534 candidates (of my own candidates, not the whole server) later, when 1 in 13106 candidates should be prime! That's a 4% chance of finding at least one prime.

henryzz 2014-04-05 17:24

It makes sense for these things to average out eventually.

gd_barnes 2014-04-18 19:25

841*2^1307465-1 is prime

kracker 2014-04-29 15:38

363*2^1547344-1 is prime!

AMDave 2014-04-30 08:21

That's a top5000 prime.
Do you have a top5000 registration or do you want Gary to register the primes for you?

Mini-Geek 2014-04-30 12:08

[QUOTE=AMDave;372354]That's a top5000 prime.
Do you have a top5000 registration or do you want Gary to register the primes for you?[/QUOTE]

I pointed him to the Top 5k instructions, and he's [URL="http://primes.utm.edu/primes/page.php?id=117753"]already submitted it[/URL], crediting "Inouye, PSieve, Srsieve, NPLB, LLR". From what I can tell, that's right and he's done. :smile:

AMDave 2014-04-30 13:50

Suuuhweeeet ! ... and Thank You :)

Mini-Geek 2014-05-20 11:40

[URL="http://primes.utm.edu/primes/page.php?id=117867"]393*2^1583890-1 is Prime![/URL]

476801 digits, should enter the list at 1076 or so. First top 5k prime with my new Haswell. :smile: Very nearly 47680[B]2[/B] digits. log[sub]10[/sub] is 476800.99422477, number begins with 98679...


All times are UTC. The time now is 22:20.

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