mersenneforum.org (https://www.mersenneforum.org/index.php)
-   Riesel Prime Search (https://www.mersenneforum.org/forumdisplay.php?f=59)

 MooooMoo 2008-07-21 19:09

This is a bit old, but Rieselsieve found a million+ digit prime a month ago:

[url]http://primes.utm.edu/primes/page.php?id=85221[/url]

Unfortunately, their website, [url]http://www.rieselsieve.com/[/url] , appears to have been down for the past two weeks.

 kar_bon 2008-07-22 13:36

[QUOTE=MooooMoo;138119]This is a bit old, but Rieselsieve found a million+ digit prime a month ago:

[url]http://primes.utm.edu/primes/page.php?id=85221[/url]

Unfortunately, their website, [url]http://www.rieselsieve.com/[/url] , appears to have been down for the past two weeks.[/QUOTE]

yes, i noticed this prime first in the Top-5000 database.

see [url]http://www.rieselprime.org/RieselProblem.htm[/url] too

 Cruelty 2008-07-28 14:51

[URL="http://primes.utm.edu/primes/page.php?id=85350"]WOW![/URL] :tu:

 Cruelty 2008-08-18 14:15

According to PrimeGrid news they have found a new "321" prime. This will most likely put RPS on the 7-th place in terms of score...

 gd_barnes 2008-08-20 11:06

[quote=Cruelty;139473]According to PrimeGrid news they have found a new "321" prime. This will most likely put RPS on the 7-th place in terms of score...[/quote]

At this point, I thought that Primegrid would get full credit for the prime. I think the 321search project stopped at n=5M. (Anyone know for sure?)

You are correct, RPS lead over 321search is 4993-2608 or a 2385 difference. Assuming half-credit, it would take a prime with a score of 4770 for 321search to overtake RPS, which an exponent of n=~5.4M should be.

But I'm sure it wouldn't take long for RPS to hop back into 6th again. :smile:

 mdettweiler 2008-08-20 14:50

[quote=gd_barnes;139542]At this point, I thought that Primegrid would get full credit for the prime. I think the 321search project stopped at n=5M. (Anyone know for sure?)

You are correct, RPS lead over 321search is 4993-2608 or a 2385 difference. Assuming half-credit, it would take a prime with a score of 4770 for 321search to overtake RPS, which an exponent of n=~5.4M should be.

But I'm sure it wouldn't take long for RPS to hop back into 6th again. :smile:[/quote]
I hear PrimeGrid has now held off on 3*2^n-1 for the time being--now they're doing 3*2^n+1 until it's caught up with the former. So, that's probably what they found, in which case they would get full credit, because 3*2^n+1 is a project they're doing all on their own.

 axn 2008-08-20 21:16

[QUOTE=Anonymous;139551]I hear PrimeGrid has now held off on 3*2^n-1 for the time being--now they're doing 3*2^n+1 until it's caught up with the former. So, that's probably what they found, in which case they would get full credit, because 3*2^n+1 is a project they're doing all on their own.[/QUOTE]

[url]http://primes.utm.edu/primes/page.php?id=85438[/url]

 kar_bon 2008-08-28 10:35

another one from Benson: 9*2^2060941-1 [url]http://primes.utm.edu/primes/page.php?id=85462[/url]

 Kosmaj 2008-09-16 21:19

First primes with more than 10M digits

Two new, huge Mersenne primes!

2^43112609-1, 12978189 digits, found on August 23
2^37156667-1, 11185272 digits, found on September 6

 Kosmaj 2008-11-07 03:22

New Gen Woodall Record

Congrats to Hugo (p237) on the new GW record!

[URL="http://primes.utm.edu/primes/page.php?id=85721"]189620*19^189620-1[/URL] (242483 digits).

 Cruelty 2008-11-16 08:32

[URL="http://primes.utm.edu/primes/page.php?id=85758"]The first non-Mersenne megaprime from Curtis Cooper[/URL] :tu:

All times are UTC. The time now is 21:51.