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 2008-07-21, 19:09 #67 MooooMoo Apprentice Crank     Mar 2006 2·227 Posts This is a bit old, but Rieselsieve found a million+ digit prime a month ago: http://primes.utm.edu/primes/page.php?id=85221 Unfortunately, their website, http://www.rieselsieve.com/ , appears to have been down for the past two weeks.
2008-07-22, 13:36   #68
kar_bon

Mar 2006
Germany

2,801 Posts

Quote:
 Originally Posted by MooooMoo This is a bit old, but Rieselsieve found a million+ digit prime a month ago: http://primes.utm.edu/primes/page.php?id=85221 Unfortunately, their website, http://www.rieselsieve.com/ , appears to have been down for the past two weeks.
yes, i noticed this prime first in the Top-5000 database.

see http://www.rieselprime.org/RieselProblem.htm too

 2008-07-28, 14:51 #69 Cruelty     May 2005 2·809 Posts
 2008-08-18, 14:15 #70 Cruelty     May 2005 2·809 Posts 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...
2008-08-20, 11:06   #71
gd_barnes

May 2007
Kansas; USA

3·11·307 Posts

Quote:
 Originally Posted by Cruelty 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...

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.

2008-08-20, 14:50   #72
mdettweiler
A Sunny Moo

Aug 2007
USA (GMT-5)

3×2,083 Posts

Quote:
 Originally Posted by gd_barnes 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.
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.

2008-08-20, 21:16   #73
axn

Jun 2003

107618 Posts

Quote:
 Originally Posted by Anonymous 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.
http://primes.utm.edu/primes/page.php?id=85438

 2008-08-28, 10:35 #74 kar_bon     Mar 2006 Germany 2,801 Posts another one from Benson: 9*2^2060941-1 http://primes.utm.edu/primes/page.php?id=85462
 2008-09-16, 21:19 #75 Kosmaj     Nov 2003 2·1,811 Posts 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
 2008-11-07, 03:22 #76 Kosmaj     Nov 2003 2×1,811 Posts New Gen Woodall Record Congrats to Hugo (p237) on the new GW record! 189620*19^189620-1 (242483 digits).
 2008-11-16, 08:32 #77 Cruelty     May 2005 110010100102 Posts

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