951*2^800305-1 is prime
Having a really good time with primes this year.

851*2^801966-1 is prime.

819*2^796381-1 is prime

Ototero found 913*2^796423-1 is prime.

979*2^803865-1 is prime.

983*2^799052-1 is prime

949*2^806651-1 is prime.

313*2^1137387-1 is prime.

987*2^812548-1 is prime

887*2^817266-1 is prime

925*2^824371-1
849*2^824464-1
are prime. :smile:

2341*2^255665-1 is Prime!

Neo

[QUOTE=Neo;256867]2341*2^255665-1 is Prime!

Neo[/QUOTE]

Neo,

It is not necessary to report primes that are not in the top-5000 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 "top-5000" to the verbiage. Sorry about any confusion.


Gary

[2011-03-26 16:07:11]
995*2^824192-1 is Prime!

Rick

The first prime of the rally:

847*2^835257-1 is prime

961*2^849471-1 is Prime

Lennart

945*2^860227-1 is Prime

Lennart

969*2^857264-1 is Prime

Sashixi found:

909*2^862551-1 is prime

Finally--I'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*2^866334-1[/url] is prime!

This is my first top-5000-worthy 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]Finally--I've at long last found a prime on the 7th Drive! :big grin: ...

This is my first top-5000-worthy 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*2^868878-1 is prime.

801*2^868105-1 is Prime
843*2^880091-1 is Prime
801*2^880622-1 is Prime

Lennart

1001*2^885618-1 confirmed prime

Lennart

813*2^891218-1 is Prime

Lennart

873*2^893012-1 is Prime

Lennart

883*2^894155-1 is prime

Rick

855*2^898045-1 is Prime


Lennart

here's one for LLRnet:

983*2^877520-1 is prime!

1001*2^901926-1 is confirmed prime

--
Lumiukko

981*2^904438-1 is prime.

871*2^904541-1 is Prime

Lennart

961*2^906211-1 is Prime

Lennart

Ototero found:

843*2^924698-1 is prime

825*2^928684-1 is Prime!

Tim found:

989*2^905968-1 is prime

Well, it looks like my prime drought is indeed passed:

[url=http://primes.utm.edu/primes/page.php?id=99735]829*2^914335-1[/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*2^914335-1[/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 one-per-week! :wink:
Long may it continue.

edit:
Hey, this happened last time you found a prime:

965*2^914686-1 is prime.

[QUOTE=Flatlander;258807]:tu:
Nearly one-per-week! :wink:
Long may it continue.

edit:
Hey, this happened last time you found a prime:

965*2^914686-1 is prime.[/QUOTE]
Hmm, go figure. I guess I'll have to find another one for you next week, then... :smile:

843*2^918816-1 is prime.

915*2^947117-1 is prime.

999*2^951405-1 is prime

829*2^963783-1 is prime.

875*2^954840-1 is Prime!

987*2^967188-1 is prime.

833*2^970796-1 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*2^973523-1 is prime

[URL]http://primes.utm.edu/primes/page.php?id=100538[/URL]

983*2^982604-1 is Prime

909*2^975659-1 is prime

825*2^987356-1 is Prime


Lennart

923*2^977574-1 is prime

Lennart found 845*2^991358-1 is prime.

819*2^981008-1
If finally happened.

871*2^995093-1 is prime

851*2^999854-1 is Prime
825*2^999698-1 is Prime

Lennart:threadhijacked::grin::grin:

497*2^1000426-1 is Prime

321*2^1363671-1 is prime

919*2^996819-1 is prime

[QUOTE=Lennart;265492]851*2^999854-1 is Prime
825*2^999698-1 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
sub-thread title why posting a Proth prime constituted a hijacking.

-bdodson

[QUOTE=kar_bon;265852]321*2^1363671-1 is prime[/QUOTE]

Only ~8k difference the next prime for k=321:

321*2^1371846-1 is prime.

[QUOTE=kar_bon;266961]Only ~8k difference the next prime for k=321:

321*2^1371846-1 is prime.[/QUOTE]

Nice. :smile:
The question is, will there now be a huge gap? :unsure:

513*2^1011678-1 is prime.

469*2^1012299-1 is prime. :smile:

Odicin has two top-5000 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*2^1017306-1
549*2^1021391-1
are prime. :smile:

441*2^1021669-1 is prime.

407*2^1025072-1 is prime.

odicin found:

585*2^1016441-1 is prime
425*2^1016928-1 is prime

411*2^1025451-1 is prime.

437*2^1023678-1 is prime.

ocidin found:

555*2^1029045-1 is prime

453*2^1036971-1 is prime.

581*2^1035962-1 is prime.

[url=http://primes.utm.edu/primes/page.php?id=101881]531*2^1031987-1[/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, nice-n-juicy at this level.

513*2^1038382-1 is prime.

339*2^1410789-1 is prime

Awesome
 

[QUOTE=kar_bon;271418]339*2^1410789-1 is prime[/QUOTE]

According to our primes table, that's the biggest bad-ass NPLB prime to-date.

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*2^1039963-1 is prime.

593*2^1040744-1 is prime.

489*2^1041511-1 is prime.

Sashixi found:

511*2^1051499-1 is prime

Another one from port 9000:

[url=http://primes.utm.edu/primes/page.php?id=102391]525*2^1053162-1[/url] is prime!

327*2^1473201-1 is prime. :smile:

333*2^1474766-1 is prime. :surprised

Sashixi found:

511*2^1055989-1 is prime

315*2^1539539-1 is prime.

Sashixi found:

549*2^1063317-1 is prime
473*2^1063908-1 is prime

333*2^1537644-1 is prime.

(Max also has one.)

[url=http://primes.utm.edu/primes/page.php?id=102864]523*2^1062947-1[/url] is prime. :smile:

[URL="http://primes.utm.edu/primes/page.php?id=103429"]503*2^1070448-1[/URL] is prime.

315*2^1639432-1 is prime.

[QUOTE]315*2^1639432-1 is prime. [/QUOTE]

Nice one Chris. Almost half a million digits.

:bow::bow: