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Old 2007-01-26, 01:37   #12
Kosmaj
 
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New record Woodall :surprised What a surprise!

1268979*2^1268979-1 (382007 digits)

Discovered by W. Siemelink using LLR (L201). Congrats!
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Old 2007-02-14, 22:02   #13
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Check this out. k>60bit found using LLR
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Old 2007-03-15, 17:40   #14
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I hope my post won't clutter up this thread too much ; my excuses in advance if so, and moderators, please move it to wherever it should be if this place is not OK !
I just discovered the existence of LLR.
Is the search for GM's somewhere somehow coordinated ?
(People declaring to search some ranges...)
To what extend are the gmfcandidates prefactored or elsehow selected ?
I just ran llr somehow randomly on such a candidate and it IMMEDIATELY (time << 1 second) found a factor (2^16666417-...+1 has factor 18068995989053)
- how comes that this easy finding is not mentioned in the gmfcand... file while other bigger factors are there ?
Again sorry for my ignorance and maybe inappropriate posting...
PS: the llr program does not seem to write a save file when it's killed, like mprime...?
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Old 2007-03-15, 23:13   #15
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gmfcandidates is prefactored to 32 bits for both GM and GQ, meaning that only if a factor is found for both such an exponent has been eliminated... however by default LLR will look only for GMs so only GM factors will be reported. Check out LLR documentation for details.

BTW: when exiting LLR it will always save it's current progress.
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Old 2007-06-08, 08:35   #16
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New Woodall record
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Old 2007-06-08, 09:43   #17
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Quote:
Originally Posted by Cruelty View Post
I am very happy. I've found now two Woodall primes in 10 months. Allthough the first two months I was unaware that they are called Woodall primes and that I wasn't the first to think of their special form n*2^n-1.

Willem.
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Old 2007-06-08, 13:07   #18
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Congratulations!!!
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Old 2007-06-27, 06:39   #19
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Jeff (L399) of TPS dumped alone about 60 primes at n=333,333 yestreday One more such dump and he will be in top-10 by number!
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Old 2007-07-21, 22:10   #20
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Congrats to Maks and his son on new largest repunit PRP:

(10^270343-1)/9
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Old 2007-08-04, 20:31   #21
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3 Generalized Fermat primes have been reported under an anonymous account first, second, third - congrats!
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Old 2007-08-05, 03:07   #22
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Those 3 are a pretty fortunate grouping! I'd ask "what are the chances?", but knowing this forum, someone would actually calculate it.

Anyone know if primality testing generalized fermats is faster or slower than LLR for same-size riesel numbers?

-Curtis
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