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2015-09-17, 17:09   #12
pepi37

Dec 2011
After milion nines:)

3×11×37 Posts

Quote:
 Originally Posted by VBCurtis Huh? What are you talking about? The 5000th prime is from the primegrid effort, as Batalov states.
If I understand correctly, Batalov says that day is come when Primegrid primes like 2196064286817 · 21290000 - 1 will not be primes on Top5000 any more
But they are still primes since their length is 388342 digits and
Quote:
 To make the top 5000 today a prime must have 388339 numbers
So we are still 3 digits longer , and they are in Top 5000

 2015-09-17, 18:08 #13 VBCurtis     "Curtis" Feb 2005 Riverside, CA 2×1,997 Posts You do not understand correctly- those primes occupy the bottom 1800 places of the list, so your speculation of "a few weekends" is off by a year or two. Batalov stated that primes *smaller* than this primegrid effort are now off the top 5000, and future primegrid primes at 2^1290000 will bump themselves for the rest of their project.
2015-09-17, 19:12   #14
pepi37

Dec 2011
After milion nines:)

3×11×37 Posts

Quote:
 Originally Posted by VBCurtis You do not understand correctly- those primes occupy the bottom 1800 places of the list, so your speculation of "a few weekends" is off by a year or two. Batalov stated that primes *smaller* than this primegrid effort are now off the top 5000, and future primegrid primes at 2^1290000 will bump themselves for the rest of their project.
Thanks for explanation!

2017-08-13, 14:24   #15
Batalov

"Serge"
Mar 2008
Phi(3,3^1118781+1)/3

2·4,493 Posts

Quote:
 Originally Posted by Batalov Not so many anymore. Used to be 2900, now less than 200 and shrinking, and in a couple of months they will be all gone from top5k, except those that were collected into AP3s, the SG pair and the twin pair. I wonder if they will continue running them, just like they still run GFN"15"s. _______________ "We choose to go to the moon neighborhood mall not because it was hard, but because it was easy, because that goal will serve to organize and measure the best of our energies and skills everyone gets a lolly!" (The new generation's modified and improved motto.)
Alas (for the YGG), the 1290000-bit boundary is now in the past.

And this last of the Mohicans ought to be one the shortest-lived Top5000 primes!
http://primes.utm.edu/primes/page.php?id=123838
Code:
Entrance Rank (*):        5000
Currently on list? (*):   no
Submitted:                8/12/2017 21:33:22 CDT
Removed (*):              8/12/2017 21:53:07 CDT

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