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 2008-01-22, 11:13 #2 gd_barnes     May 2007 Kansas; USA 10,357 Posts Prime to get us started... It's not quite top-5000 material but here's the first one to get us started: 745*2^333239-1 is prime (100318 digits) This is pretty good for this k-value. Even thought it's relatively average weight, up to n=260K, its previous highest prime to date was at n=75771. Gary
 2008-01-22, 13:55 #3 kar_bon     Mar 2006 Germany 1011010001102 Posts here we go: 747*2^333709-1 is prime! (100460 digits)
2008-01-22, 16:13   #4
gd_barnes

May 2007
Kansas; USA

10,357 Posts

Quote:
 Originally Posted by kar_bon here we go: 747*2^333709-1 is prime! (100460 digits)
Bring it on!

I want it noted that Prime Search has 53 top-5000 primes (now 54) at the beginning of this project and is in 9th place. We should be able to fairly quickly move up into 6th place, which is the old 15k project that has 82 primes.

Edit: It's kind of interesting that our first two primes were for k=745 and k=747.

Gary

Last fiddled with by gd_barnes on 2008-01-22 at 16:14

 2008-02-01, 09:04 #5 em99010pepe     Sep 2004 2×5×283 Posts 495*2^338804-1 is prime! 639*2^343683-1 is prime! 639*2^343305-1 is prime! 489*2^343303-1 is prime! Last fiddled with by mdettweiler on 2009-09-21 at 02:04 Reason: merging posts to clean things up a bit
2008-02-01, 16:14   #6
gd_barnes

May 2007
Kansas; USA

101000011101012 Posts

Quote:
 Originally Posted by em99010pepe 495*2^338804-1 is prime!
FINALLY! A top-5000 prime for 400<k< 500. There are just a few less k's in the 400's than the others due to prior reservations and searches but it was still surprising how long it took to find one.

2 more to move into 7th place all alone!

2008-02-04, 17:26   #7
gd_barnes

May 2007
Kansas; USA

10,357 Posts

Quote:
 Originally Posted by em99010pepe 639*2^343305-1 is prime! 489*2^343303-1 is prime!
Great run Carlos! That's amazing on k=639. I cannot recall primes so close together on a single k at such a high n and such a low k. (only n=378 difference)

In the mean time, another 'smaller' one:

533*2^321410-1 is prime

Gary

2008-02-05, 16:42   #8
mdettweiler
A Sunny Moo

Aug 2007
USA (GMT-5)

3×2,083 Posts

Quote:
 Originally Posted by em99010pepe From LLRNet 693*2^321959-1 is prime! (IronBits)
Quote:
 Originally Posted by em99010pepe From LLRNet (IronBits) 795*2^322014-1 is prime! EDIT: Primes from LLRNet were double-checked.
Yay! Our first LLRnet primes! And in such close succession!

 2008-02-05, 17:33 #9 gd_barnes     May 2007 Kansas; USA 10,357 Posts Wow, I'm offline for 10 hours to get some rest and I come back and we have 5 new primes including 2 top-5000's!!
 2008-02-10, 20:13 #10 em99010pepe     Sep 2004 1011000011102 Posts All primes so far found by LLRNet have been double-checked by me using LLR 3.7.1c on an AMD 64 3000+ (2GHz). Code: 693*2^321959-1 is prime! Time : 255.119 sec. 795*2^322014-1 is prime! Time : 234.755 sec. 833*2^322530-1 is prime! Time : 277.265 sec. 423*2^324430-1 is prime! Time : 266.972 sec. 565*2^324789-1 is prime! Time : 240.924 sec. 495*2^325070-1 is prime! Time : 240.929 sec. 473*2^325256-1 is prime! Time : 240.986 sec. 789*2^325375-1 is prime! Time : 320.555 sec. 705*2^325274-1 is prime! Time : 241.211 sec. 741*2^325661-1 is prime! Time : 241.499 sec. 625*2^327291-1 is prime! Time : 242.718 sec. 603*2^325792-1 is prime! Time : 286.115 sec. 667*2^327465-1 is prime! Time : 141.441 sec. 915*2^328673-1 is prime! Time : 292.732 sec. 605*2^329452-1 is prime! Time : 293.204 sec. 833*2^329490-1 is prime! Time : 293.129 sec. 895*2^329641-1 is prime! Time : 346.403 sec. 987*2^329652-1 is prime! Time : 326.962 sec. 987*2^330033-1 is prime! Time : 341.785 sec. 973*2^330363-1 is prime! Time : 325.952 sec. 705*2^330472-1 is prime! Time : 338.511 sec.
 2008-02-13, 17:26 #11 em99010pepe     Sep 2004 2×5×283 Posts Yes he does. user=Free-DC_em99010pepe [02/13/08 17:07:35] 573*2^350426-1 is prime! With only one core on LLRnet!!! 441*2^323913-1 is prime! (Confirmed) Last fiddled with by em99010pepe on 2008-02-13 at 17:32

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