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-   -   POST LOTS AND LOTS OF PRIMES HERE (https://www.mersenneforum.org/showthread.php?t=13180)

 paulunderwood 2020-02-06 12:49

[QUOTE=pepi37;536873]What was last prime in that sequence?[/QUOTE]

[CODE]----- -------------------------------- ------- ----- ---- --------------
rank description digits who year comment
----- -------------------------------- ------- ----- ---- --------------
673 69*2^3140225-1 945304 L3764 2014
696 69*2^3097340-1 932395 L3764 2014
1004 69*2^2649939-1 797713 L3764 2014
----- -------------------------------- ------- ----- ---- --------------[/CODE]

 storm5510 2020-02-08 00:34

[QUOTE=VBCurtis;536450]You should use the "post small primes... here" thread for primes smaller than the [B]top-5000[/B] list cutoff, presently in the vicinity of 2^1.4M...[/QUOTE]

Curious. Where is the top 5000 list?

 paulunderwood 2020-02-08 02:12

[QUOTE=storm5510;537024]Curious. Where is the top 5000 list?[/QUOTE]

[url]https://primes.utm.edu/primes/home.php[/url]

 storm5510 2020-02-08 15:54

[QUOTE=paulunderwood;537034][URL]https://primes.utm.edu/primes/home.php[/URL][/QUOTE]

Bookmarked. Thank you! :smile:

 Cruelty 2020-02-19 19:51

25*2^5152151-1 is prime! (1550954 decimal digits) - I've just noticed that previous prime for this k was reported by me 11+ years ago.

 Cruelty 2020-02-19 20:07

[QUOTE=storm5510;536480] I would like to take a look at these. I will look around for them.[/QUOTE]
There is no point in sieving k*2^n-1 sequences for k<10000, as there are sieve files ready and waiting, read more about it [URL="https://www.mersenneforum.org/showthread.php?t=18255"]here[/URL] :tu:

 paulunderwood 2020-02-19 23:01

[QUOTE=Cruelty;537940]25*2^5152151-1 is prime! (1550954 decimal digits) - I've just noticed that previous prime for this k was reported by me 11+ years ago.[/QUOTE]

Congrats! Have you been testing k=25 for a solid 11 years, or instead picked it up again recently? :unsure:

 storm5510 2020-02-19 23:14

[QUOTE=Cruelty;537940]25*2^5152151-1 is prime! (1550954 decimal digits) - I've just noticed that previous prime for this k was reported by me 11+ years ago.[/QUOTE]

There is a [I]k[/I] = 25 entry in the new [I]Wiki Riesel Prime[/I] database. It is [U]unassigned[/U]. The last update was in 2014. Perhaps you could claim it and bring it up-to-date?

 Cruelty 2020-02-19 23:30

[QUOTE=paulunderwood;537956]Congrats! Have you been testing k=25 for a solid 11 years, or instead picked it up again recently? :unsure:[/QUOTE]
Solid 11 years :smile: This is quite "heavy" k.

 Cruelty 2020-02-19 23:32

[QUOTE=storm5510;537957]There is a [I]k[/I] = 25 entry in the new [I]Wiki Riesel Prime[/I] database. It is [U]unassigned[/U]. The last update was in 2014. Perhaps you could claim it and bring it up-to-date?[/QUOTE]
The most up-to-date reservations and statuses are available on mersenneforum.org, and other lists like rieselprime.de or 15k.org are outdated.

 kar_bon 2020-02-20 09:31

Correct. The rieselprime pages (RPPDb) I won't update anymore. I've only taken the data from there into the Wiki by now, but the next aim is to update all missing primes and current reservations from this forum.
I know the problem to update pages for prime collections like RPPDb or 15k.org: the Wiki got the advantage that every logged in user can reserve and update any k-value by themselves including the history, only an admin has to cofirm the changes.
To set up the new data will take some time and I see the need to make a note in the Wiki about this: no current data yet.

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