951*2^8003051 is prime
Having a really good time with primes this year. 
851*2^8019661 is prime.

819*2^7963811 is prime

Ototero found 913*2^7964231 is prime.

979*2^8038651 is prime.

983*2^7990521 is prime

949*2^8066511 is prime.

313*2^11373871 is prime.

987*2^8125481 is prime

887*2^8172661 is prime

925*2^8243711
849*2^8244641 are prime. :smile: 
2341*2^2556651 is Prime!
Neo 
[QUOTE=Neo;256867]2341*2^2556651 is Prime!
Neo[/QUOTE] Neo, It is not necessary to report primes that are not in the top5000 of all time in this thread. We don't have any formal place to report these smaller primes. We just accumulate them and add them to the applicable post and show who found them as we go along. I have changed the title of this thread to add "top5000" to the verbiage. Sorry about any confusion. Gary 
[20110326 16:07:11]
995*2^8241921 is Prime! Rick 
The first prime of the rally:
847*2^8352571 is prime 
961*2^8494711 is Prime
Lennart 
945*2^8602271 is Prime
Lennart 
969*2^8572641 is Prime

Sashixi found:
909*2^8625511 is prime 
FinallyI've at long last found a prime on the 7th Drive! :big grin: (It may not seem like a long time just considering the 7th Drive, but when you count all the time I spent on the 5th and 6th trying to find a prime...yeah, it's been a while. :smile:)
[url=http://primes.utm.edu/primes/page.php?id=99350]921*2^8663341[/url] is prime! This is my first top5000worthy NPLB prime that I've found since June 2009! :shock: (I reported one in September 2010 but that was actually one of Gary's that he "gave" me because he lost a bet.) :party: :party: :party: Okay, that's enough celebration...after all, it's just another 7th Drive prime, one of which is not [i]supposed[/i] to be too hard to obtain. :rolleyes: 
[QUOTE=mdettweiler;257902]FinallyI've at long last found a prime on the 7th Drive! :big grin: ...
This is my first top5000worthy NPLB prime that I've found since June 2009! :shock: (I reported one in September 2010 but that was actually one of Gary's that he "gave" me because he lost a bet.)[/QUOTE] Congrats! Hopefully my drought of NPLB primes will end too  I've done 10857 candidates with 0 primes on port 9000. But I can't complain too much, as I recently got a large top 5000 prime on CRUS's base 16. :smile: And 10857 is not nearly as bad as how many you had with 0 primes! (~36598 on port 9000) 
It's about time! lol Anyway, congrats. When counting port 9000 and the CRUS port, I think you had gone over 50,000 pairs without a prime; a remarkable drought.

Plenty of time for you to find another one Max!
Meantime: 915*2^8688781 is prime. 
801*2^8681051 is Prime
843*2^8800911 is Prime 801*2^8806221 is Prime Lennart 
1001*2^8856181 confirmed prime
Lennart 
813*2^8912181 is Prime
Lennart 
873*2^8930121 is Prime
Lennart 
883*2^8941551 is prime
Rick 
855*2^8980451 is Prime
Lennart 
here's one for LLRnet:
983*2^8775201 is prime! 
1001*2^9019261 is confirmed prime
 Lumiukko 
981*2^9044381 is prime.

871*2^9045411 is Prime
Lennart 
961*2^9062111 is Prime
Lennart 
Ototero found:
843*2^9246981 is prime 
825*2^9286841 is Prime!

Tim found:
989*2^9059681 is prime 
Well, it looks like my prime drought is indeed passed:
[url=http://primes.utm.edu/primes/page.php?id=99735]829*2^9143351[/url] is prime! :grin: This one came on my Q6600, the machine that has been particularly allergic to primes of late. Also of note, this prime is my largest ever (my previous record being [url=http://primes.utm.edu/primes/page.php?id=95525]172257*6^349166+1[/url] at 271710 digits; this latest prime comes in at 275246 digits.) 
[QUOTE=mdettweiler;258784]Well, it looks like my prime drought is indeed passed:
[url=http://primes.utm.edu/primes/page.php?id=99735]829*2^9143351[/url] is prime! :grin: This one came on my Q6600, the machine that has been particularly allergic to primes of late. Also of note, this prime is my largest ever (my previous record being [url=http://primes.utm.edu/primes/page.php?id=95525]172257*6^349166+1[/url] at 271710 digits; this latest prime comes in at 275246 digits.)[/QUOTE] :tu: Nearly oneperweek! :wink: Long may it continue. edit: Hey, this happened last time you found a prime: 965*2^9146861 is prime. 
[QUOTE=Flatlander;258807]:tu:
Nearly oneperweek! :wink: Long may it continue. edit: Hey, this happened last time you found a prime: 965*2^9146861 is prime.[/QUOTE] Hmm, go figure. I guess I'll have to find another one for you next week, then... :smile: 
843*2^9188161 is prime.

915*2^9471171 is prime.

999*2^9514051 is prime

829*2^9637831 is prime.

875*2^9548401 is Prime!

987*2^9671881 is prime.

833*2^9707961 is prime

665*2^981093+1 is prime.
295K digits, PrimeGrid's Proth Primes are rapidly approaching 300K digits (after having been below 200K for quite some time, as we finished through n=666666). This is my 52nd top5000 prime, of which 46 are still on the list; puts me at 18th on the top20 list by number of primes. (Sorry: primegrid primes count?) Bruce 
885*2^9735231 is prime

[URL]http://primes.utm.edu/primes/page.php?id=100538[/URL]
983*2^9826041 is Prime 
909*2^9756591 is prime

825*2^9873561 is Prime
Lennart 
923*2^9775741 is prime

Lennart found 845*2^9913581 is prime.

819*2^9810081
If finally happened. 
871*2^9950931 is prime

851*2^9998541 is Prime
825*2^9996981 is Prime Lennart:threadhijacked::grin::grin: 
497*2^10004261 is Prime

321*2^13636711 is prime

919*2^9968191 is prime

[QUOTE=Lennart;265492]851*2^9998541 is Prime
825*2^9996981 is Prime Lennart:threadhijacked::grin::grin:[/QUOTE] 93*2^1493877+1 is Prime [with (449704 digits), Divides GF(1493871,8) = GF(a,b) = b^2^a +1, or F_n(a,1), a=8, n=1493871 ... _or_ F_{b,m} = b^2^m+1, b=8, m=1493871] 
[QUOTE=bdodson;266773]93*2^1493877+1 is Prime
[with (449704 digits), Divides GF(1493871,8) = GF(a,b) = b^2^a +1, or F_n(a,1), a=8, n=1493871 ... _or_ F_{b,m} = b^2^m+1, b=8, m=1493871][/QUOTE] This thread is only for Riesel primes found by NPLB. 
[QUOTE=gd_barnes;266818]This thread is only for Riesel primes found by NPLB.[/QUOTE]
My apologies for the distraction. I wasn't able to determine from the subthread title why posting a Proth prime constituted a hijacking. bdodson 
[QUOTE=kar_bon;265852]321*2^13636711 is prime[/QUOTE]
Only ~8k difference the next prime for k=321: 321*2^13718461 is prime. 
[QUOTE=kar_bon;266961]Only ~8k difference the next prime for k=321:
321*2^13718461 is prime.[/QUOTE] Nice. :smile: The question is, will there now be a huge gap? :unsure: 
513*2^10116781 is prime.

469*2^10122991 is prime. :smile:

Odicin has two top5000 primes from port 9000 that need to be reported.
I have sent an Email to his last known Email address, that is the one that the server sends notifications to. 
Apparently they are now coming in pairs then:
471*2^10173061 549*2^10213911 are prime. :smile: 
441*2^10216691 is prime.

407*2^10250721 is prime.

odicin found:
585*2^10164411 is prime 425*2^10169281 is prime 
411*2^10254511 is prime.

437*2^10236781 is prime.

ocidin found:
555*2^10290451 is prime 
453*2^10369711 is prime.

581*2^10359621 is prime.

[url=http://primes.utm.edu/primes/page.php?id=101881]531*2^10319871[/url] is prime! (my third >1M...guess these are getting a bit more commonplace these days :smile:)
I knew there was a reason why I left one quad on port 9000 even after moving everything else to CRUS 1400...well, that and the fact that the box is 300 miles away and is somewhat of a pain to mess with remotely. :rolleyes: 
Yeah, nicenjuicy at this level.
513*2^10383821 is prime. 
339*2^14107891 is prime

Awesome
[QUOTE=kar_bon;271418]339*2^14107891 is prime[/QUOTE]
According to our primes table, that's the biggest badass NPLB prime todate. Nice one kar_bon. :smile: 
Biggest found with LLRnet/PRPnet (my 7th out of biggest 10) and 4th biggest for NPLB, so far.
Let's find some more. 
573*2^10399631 is prime.

593*2^10407441 is prime.

489*2^10415111 is prime.

Sashixi found:
511*2^10514991 is prime 
Another one from port 9000:
[url=http://primes.utm.edu/primes/page.php?id=102391]525*2^10531621[/url] is prime! 
327*2^14732011 is prime. :smile:

333*2^14747661 is prime. :surprised

Sashixi found:
511*2^10559891 is prime 
315*2^15395391 is prime.

Sashixi found:
549*2^10633171 is prime 473*2^10639081 is prime 
333*2^15376441 is prime.
(Max also has one.) 
[url=http://primes.utm.edu/primes/page.php?id=102864]523*2^10629471[/url] is prime. :smile:

[URL="http://primes.utm.edu/primes/page.php?id=103429"]503*2^10704481[/URL] is prime.

315*2^16394321 is prime.

[QUOTE]315*2^16394321 is prime. [/QUOTE]
Nice one Chris. Almost half a million digits. :bow::bow: 
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