Post Lots and Lots of Top-5000 Primes Here - Page 176

paulunderwood · 2020-02-06, 12:49

Quote:

Originally Posted by pepi37

What was last prime in that sequence?

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 
-----  -------------------------------- ------- ----- ---- --------------

storm5510 · 2020-02-08, 00:34

Quote:

Originally Posted by VBCurtis

You should use the "post small primes... here" thread for primes smaller than the top-5000 list cutoff, presently in the vicinity of 2^1.4M...

Curious. Where is the top 5000 list?

paulunderwood · 2020-02-08, 02:12

Quote:

Originally Posted by storm5510

Curious. Where is the top 5000 list?

https://primes.utm.edu/primes/home.php

storm5510 · 2020-02-08, 15:54

Quote:

Originally Posted by paulunderwood

https://primes.utm.edu/primes/home.php

Bookmarked. Thank you!

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:

Originally Posted by storm5510

I would like to take a look at these. I will look around for them.

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 here

paulunderwood · 2020-02-19, 23:01

Quote:

Originally Posted by Cruelty

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.

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

storm5510 · 2020-02-19, 23:14

Quote:

Originally Posted by Cruelty

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.

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

Cruelty · 2020-02-19, 23:30

Quote:

Originally Posted by paulunderwood

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

Solid 11 years

This is quite "heavy" k.

Cruelty · 2020-02-19, 23:32

Quote:

Originally Posted by storm5510

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

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.

2020-02-19, 19:51	#1930
Cruelty May 2005 2²×11×37 Posts	252^5152151-1 is prime! (1550954 decimal digits) - I've just noticed that previous prime for this k was reported by me 11+ years ago. Last fiddled with by Cruelty on 2020-02-19 at 20:00*

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2020-02-20, 09:31	#1936
kar_bon Mar 2006 Germany 2³×379 Posts	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.