-   3*2^n-1 Search (
-   -   121*2^n-1 (

justinsane 2004-05-24 20:43

Similar to the 321 search, I am running a 12121 search. If anyone is interested in taking a range, check out what is available at [url][/url]

Thomas11 2004-06-02 17:12

Congrats on your project's latest prime:

121*2^541621-1 :w00t:

That's really amazing!

Happy hunting to you and your coworkers ...

-- Thomas

justinsane 2004-06-02 20:20


justinsane 2004-06-03 19:14

[QUOTE=Thomas11]Congrats on your project's latest prime:

121*2^541621-1 :w00t:

That's really amazing!

Happy hunting to you and your coworkers ...

-- Thomas[/QUOTE]

Just found another, 121*2^494317-1
Not as big as the last one, but 4 top primes in 5 days! It's lookin good :showoff:

paulunderwood 2004-07-14 04:51

justinsane wrote:


I'm sure you know about my 12121 search, which is essentially a spin off of this 321 search. Similarly, I have my work divided into blocks with a reservation system. I've recently written a few php scripts to automate this reservation system. All I have to do is drop sieve files into a folder and the site handles the rest (displaying which ranges are available, how many n in each range, which are reserved, which are complete, etc) It also handles all submissions and verifies whether all numbers were tested and parses those ugly lresults.txt files and grabs only the pertinent information and stores it on the server. Anyhow, it seems like it would probably help you guys out a lot ( more editing that forum post) If you want, I could send you the bundle, it would only take a few minor adjustments to make it fit for what youre doing.

See it in action at:

paulunderwood 2004-07-14 05:00

A 321 server doing a lot of the tasks I do would be a good thing.

I have been offered server software before and php working on flat files ( or MySQL ) with direct links to a website would be ideal for me as I would hope to set it up here on linux ( eventually ). (L.A.M.P.!)

In the meantime, it is not really a lot of work for me to continue updating this message board; We only have a few particpants.

Good luck with 12121.

paulunderwood 2004-08-14 13:13

[URL=][/URL] is a big prime.

Congratulations :banana:

justinsane 2004-08-15 05:39

I was going to post this monster find on here :showoff: , but you beat me to it! Credit to Michael Haas (NiceMedTexMD) for the find. Hopefully this find will bring in some testers :help:

paulunderwood 2004-11-07 17:12

Congratulations to 12121search for [URL=]their latest prime[/URL] , putting them in [URL=]11th place for prime-searching teams[/URL] :cat:

justinsane 2004-11-08 04:12

Wow, you are quick to catch on to these things! :smile:

May this message be a call to volunteers :help: to come join the 12121 search. We seem to have a high density of primes for k=121 (9 qualifying at just over one million searched)

We have also recently implemented a scoring system to "reward" individuals for work done, as well as completing up to and beyond n=1 million, and to respond to requests for smaller more "completable" ranges. There is now a broader array of range sizes, from 25 to 200.

So please join us if you have any cycles to spare. You won't be disappointed!

paulunderwood 2004-11-08 19:20

It's very close: 121 Search is now 12th place -- 15k Search has just overtaken you. Good luck with your future work and with recruiting extra help. :wink:

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