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-   -   69 * 2^n - 1 (https://www.mersenneforum.org/showthread.php?t=18600)

 diep 2013-09-17 20:26

69 * 2^n - 1

Where is the current search located at 69 * 2^n - 1?

I saw on homepage report of 2416k. I'll take over from there.
Where can i find all results so far (factorisation results, sieving results etc)?

Kind Regards,
Vincent Diepeveen
[email]diep@xs4all.nl[/email]

 VBCurtis 2013-09-18 02:42

69 is part of the "First Megabit Drive", and is searched as part of that drive. If you'd like to search for primes at that level, simply reserve a file or two from that thread- it's stickied near the top of the forum.

 diep 2013-09-18 09:24

[QUOTE=VBCurtis;353297]69 is part of the "First Megabit Drive", and is searched as part of that drive. If you'd like to search for primes at that level, simply reserve a file or two from that thread- it's stickied near the top of the forum.[/QUOTE]

Oh we have a few tflop idle here and like to search 1 prime deeply. Seeing megadrive not very active yet i'll pick a different one otherwise.

 Kosmaj 2013-09-18 10:00

Can you start k=69 from n=2500k? We'll remove k=51 from the drive at 2500k (already being tested by Retep) and at the same time we can remove k=69 as well.

Thanks!

 diep 2013-09-18 10:03

[QUOTE=Kosmaj;353313]Can you start k=69 from n=2500k? We'll remove k=51 from the drive at 2500k (already being tested by Retep) and at the same time we can remove k=69 as well.

Thanks![/QUOTE]

That's ok.
I'll start at 2500k.

 diep 2013-09-18 10:06

Until where did this range get double checked or is it entirely single checked?

 Kosmaj 2013-09-18 11:51

k=69 is completely checked from n=1 up to n=2416k.
Double check was done from n=1 up to n=100k by D. Broadhurst.

All known primes for all k<300 are listed [URL="http://www.15k.org/riesellist.html"]here[/URL]. Current limits are given as well (they may not be up to date for k=1, 3, 27, and 121).

Thanks for your interest and happy hunting! :smile:

And we'll appreciate if you include our project RPS (Riesel Prime Search) in you prover's code when you report primes.

 pinhodecarlos 2013-09-18 18:34

Why this k? :huh:

 diep 2013-09-18 18:55

Wagstaff gets 69 next year, hopefully PrimeGrid will celebrate that with a massive sprint at Wagstaff to the next PRP there, directly after Jeff Gilchrist finishes 10M, we'll collect everything then and ship it to PG hoping for that anniversary celebration :)

 diep 2013-09-25 16:57

Update 25 september: busy sieving 2500k - 10M.
Will take some time.

 amphoria 2013-09-25 17:13

[QUOTE=diep;354132]Update 25 september: busy sieving 2500k - 10M.
Will take some time.[/QUOTE]

Primegrid have already sieved all k < 10000 to a level that you are unlikely to ever achieve on your own - N < 3M to 100P and N=3-6M currently at 314P. The files can be downloaded from this thread: [url]http://www.mersenneforum.org/showthread.php?t=18255[/url]

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