20080508, 22:53  #45 
Account Deleted
"Tim Sorbera"
Aug 2006
San Antonio, TX USA
17×251 Posts 
312,988 digits. equiv. to ~2^1035000. Congrats!

20080508, 22:58  #46  
"Mark"
Apr 2003
Between here and the
5694_{10} Posts 
Quote:
BTW, all base 28 k (Sierpinski) are tested to n = 100,000. I made a mistake and did not test the base 28 Riesels. You can unreserve them. I will reserve the Sierpinski and Riesel base 27 k. Last fiddled with by rogue on 20080508 at 23:16 

20080509, 01:40  #47 
"Mark"
Apr 2003
Between here and the
2·3·13·73 Posts 
958*11^300544+1 has been verified as prime by PFGW.

20080509, 04:08  #48 
May 2007
Kansas; USA
23614_{8} Posts 
AMAZING and congrats again on a monster prime!!
I believe this will move CRUS into 12th place on primes found (from 14th) and move it into 18th place on score (from 20th). I just now looked and the score on it is 33.11! Whew! :) BTW, what was your optimal sieve depth for this? It must have been very high although I don't know what its weight is. Gary Last fiddled with by gd_barnes on 20080509 at 04:13 Reason: Corrected place on top5000 and score 
20080509, 04:55  #49 
May 2007
Kansas; USA
2^{2}·2,531 Posts 
One more interesting note on Rogue's Sierp base 11 proof: With a conjectured value of k=1490, it is the highest conjecture that has been proven to date for either side by any project. The previous highest was Sierp base 21 at k=1002.
The next challenge: What's the highest conjecture that we only have ONE k remaining on? By far, it is Sierp base 10 with a conjecture of k=9175. It has only k=7666 remaining at n=195K. Anyone care to tackle Sierp base 10? Gary 
20080509, 12:22  #50  
"Mark"
Apr 2003
Between here and the
1011000111110_{2} Posts 
Quote:
one computer and doing PRP testing on 3 others. 

20080509, 21:30  #51  
May 2007
Kansas; USA
23614_{8} Posts 
Quote:
Gary 

20080509, 21:52  #52 
"Mark"
Apr 2003
Between here and the
163E_{16} Posts 
On a PowerPC G5 at 2.5 Ghz, it took 9900 seconds (as from my original post on the subject). The verification took 7900 seconds on a 2.4 Ghz Core 2 Duo. I was rather surprised by that because I expected verification to take longer as verification of primes in other bases has taken much longer.

20080712, 08:28  #53 
May 2007
Kansas; USA
2^{2}·2,531 Posts 
I have added links to sieved files for Riesel and Sierp bases 22 and 23 (4 bases total) to the reservations web pages. 3 of the 4 files are sieved past P=5T and the other at P=~3.5T.
The files go from n=100K1M on most of the k's. The P=5T files should be nearly sufficiently sieved if you plan on testing to only n=200K. Past that, they'll need more sieving. Warning: Taking any of these bases to only n=200K is a large amount of work unless you find primes quickly. Thanks for the excellent sieving KEP! Gary Last fiddled with by gd_barnes on 20080712 at 08:30 
20080712, 09:18  #54  
Quasi Admin Thing
May 2005
1615_{8} Posts 
Quote:
Regards KEP 

Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
News  gd_barnes  No Prime Left Behind  249  20200519 15:53 
P!=NP in the news  willmore  Computer Science & Computational Number Theory  48  20100919 08:30 
Other news  Cruelty  Riesel Prime Search  41  20100308 18:46 
The news giveth, the news taketh away...  NBtarheel_33  Hardware  17  20090504 15:52 
News  KEP  Riesel Base 3 Attack  4  20081217 11:54 