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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:

ps. Please inform us about your progress from time to time, and attach your results if possible.
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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