20090605, 15:33  #78 
Aug 2002
Ann Arbor, MI
433 Posts 
I created a new directory for this (so I wouldn't potentially screw up my current assignments when I switched from 4 workers to 1), so my rolling average probably isn't where it should be. The original estimate was 4:00AM EST on the 18th (a little under 14 days), and in less than a day that estimate has decreased by 12 hours to around 4:00PM on the 17th. Given what percentage it's at now, 11.5 days seems closer to how long it'll actually take.

20090605, 15:50  #79  
Undefined
"The unspeakable one"
Jun 2006
My evil lair
13·487 Posts 
42643801
Quote:
Here it is: 42643801 It is not like there will be great news coverage or anything. And no one can "steal" it since the user name is already logged into the server. I can't understand what else could be bad about posting it. Anyhow, I guess if a mod thinks it inappropriate then this message will disappear or change or something, otherwise there it is just up there. Have fun. Last fiddled with by retina on 20090605 at 15:54 Reason: 42643801 

20090605, 15:55  #80 
Feb 2004
France
3^{2}×103 Posts 
8 days and a half.
My verification should end Sunday 14th morning (France time).
T. 
20090605, 17:16  #81 
Aug 2002
Ann Arbor, MI
433 Posts 

20090605, 17:17  #82 
Oct 2008
n00bville
2^{3}×7×13 Posts 

20090605, 17:19  #83 
Oct 2008
n00bville
728_{10} Posts 

20090605, 17:25  #84 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
2^{11}·5 Posts 

20090605, 18:01  #85 
"Nancy"
Aug 2002
Alexandria
2,467 Posts 
Maybe there's a simple explanation why Mersenne primes M_{[I]p[/I]} tend to have highly composite p1. Trivially, 2^{p}1 and 2^{p}2 have no common factor, and the latter is 2(2^{p1}1) which has a lot of algebraic factors if p1 is highly composite, and so will have a lot of small prime factors, thus slightly reducing the probability that 2^{p}1 has small prime factors. The effect can't be very strong, though: divisors of 2^{p}1 are of form 2kp+1 and few factors of 2^{p1}1 will be of this form. Still, it's the only thing I can think of how the number of divisors of p1 might enter the picture.
If this effect is the reason for the smootherthanexpected p1 in prime M_{[I]p[/I]}, then M_{[I]p[/I]} with smooth p1should simply have a slightly better chance of surviving trial division, but among the trialdivided candidates, the probability that M_{[I]p[/I]} is prime should be independent of the smoothness of p1 again. Alex 
20090605, 18:35  #86 
Feb 2004
France
1637_{8} Posts 
Itanium2

20090605, 19:08  #87 
Aug 2002
Ann Arbor, MI
433 Posts 
I think your first estimate has you beating me by less than a day, though probably more than a day if you switch to faster hardware. I'm at 10.65% after 24 hours, so my total time should be around 9.5 days if I keep the same pace.

20090605, 20:37  #88 
Feb 2004
France
3^{2}·103 Posts 
See you the 14th
Thanks to Guillermo Ballester Valor work and Ernst Mayer, we have 2 other Mersenne prime checkers.
I started 24h after you Kevin, and you say you are about 24h slower than me. So we'll end the check at about the same time: Sunday 14th. Jeff (Gilchrist) should end his check about 5 days after us (if everything's fine for all of us, for sure). Is there anyone else who is running a verification of this candidate ? Ernst (Mayer), are you around ? Damned. I already have 4 or 5 Mersenne prime posters... One more ?! I've seen the movie "Home" by Yann ArthusBertrand: I'm not sure the bigprime hunting will continue for dozens of years... T. Last fiddled with by T.Rex on 20090605 at 20:48 
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