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-   -   Other Primes (https://www.mersenneforum.org/showthread.php?t=6374)

em99010pepe 2008-05-24 12:27

[quote=Cruelty;134167]4*3^350767-1 (167359 digits)[/quote]

You stall the server for 13.86 hours!!! lol
Congratulations.

Cruelty 2008-05-24 14:00

Verification took me 32200 seconds on a 3GHz Core2 :smile:

Cruelty 2008-05-30 05:28

Another k=4, b=3 prime
 
4*3^353635-1 (168728 digits)

Kosmaj 2008-05-30 06:01

Congrats on yet another one, very close to the one you reported a week ago.
:shock::smile:

Cruelty 2008-05-30 12:21

Thanks! It's time for k=2 prime :wink:

em99010pepe 2008-06-01 18:45

Benson prime:

[url=http://primes.utm.edu/primes/page.php?id=85095]19*2^1684813-1[/url]

Cruelty 2008-06-10 09:05

[URL="http://primes.utm.edu/primes/page.php?id=85126"]Another one from Curtis Cooper[/URL] :tu:

Flatlander 2008-06-10 23:10

Twin Prime
 
108615*2^110342+-1 is twin prime!

Comes in at 7th place :smile:

Kosmaj 2008-06-13 01:09

Congrats on a nice twin!

If it's not a secret how many n's did you check? I suppose you used the approach recently suggested by Robert Smith (?) Or, how many LLR tests in total?

Thanks.

Flatlander 2008-06-13 16:11

[quote=Kosmaj;135790]Congrats on a nice twin!

If it's not a secret how many n's did you check? I suppose you used the approach recently suggested by Robert Smith (?) Or, how many LLR tests in total?

Thanks.[/quote]
Thanks Kosmaj.
Well, I'm not sure how much to give away because I intend to search higher and I don't know how much was pure luck and how much was technique.
I suspect a large amount of luck because it was found after just 220,000 candidates and 164 Riesel primes. (Just 10 days on all 4 cores at 3.18GHz, including sieving.)
It's a refinement of this idea:
[URL]http://mersenneforum.org/showpost.php?p=117068&postcount=6[/URL]

I'm now searching for the No.1 twin until I find one or get bored. Probably the latter.

Chris

Kosmaj 2008-06-30 01:44

A new k=27 prime by 12121:
27*2^1253870-1 (377454 digits)

Congrats to Frank (L65)!


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