mersenneforum.org  

Go Back   mersenneforum.org > Great Internet Mersenne Prime Search > News

Reply
 
Thread Tools
Old 2009-06-05, 15:33   #78
Kevin
 
Kevin's Avatar
 
Aug 2002
Ann Arbor, MI

433 Posts
Default

Quote:
Originally Posted by petrw1 View Post
I've got the same machine...estimated timings is 11.5 days.
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.
Kevin is offline   Reply With Quote
Old 2009-06-05, 15:50   #79
retina
Undefined
 
retina's Avatar
 
"The unspeakable one"
Jun 2006
My evil lair

13·487 Posts
Default 42643801

Quote:
Originally Posted by unconnected View Post
I'll run P-1 test. BTW, what is the secret atmosphere about that exponent? Anybody can find it, knowing userID from first post.
Indeed, why is everyone beating around the bush?

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 2009-06-05 at 15:54 Reason: 42643801
retina is online now   Reply With Quote
Old 2009-06-05, 15:55   #80
T.Rex
 
T.Rex's Avatar
 
Feb 2004
France

32×103 Posts
Default 8 days and a half.

My verification should end Sunday 14th morning (France time).
T.
T.Rex is offline   Reply With Quote
Old 2009-06-05, 17:16   #81
Kevin
 
Kevin's Avatar
 
Aug 2002
Ann Arbor, MI

433 Posts
Default

Quote:
Originally Posted by T.Rex View Post
My verification should end Sunday 14th morning (France time).
T.
Is that on the Itanium, or the Nehalem?
Kevin is offline   Reply With Quote
Old 2009-06-05, 17:17   #82
joblack
 
joblack's Avatar
 
Oct 2008
n00bville

23×7×13 Posts
Default

Quote:
Originally Posted by jrk View Post
M46.
It's not certain ... you will name it M46*.
joblack is offline   Reply With Quote
Old 2009-06-05, 17:19   #83
joblack
 
joblack's Avatar
 
Oct 2008
n00bville

72810 Posts
Default

Quote:
Originally Posted by lycorn View Post
"Helloooo, I have probably found a prime, is there anybody out there?..." It may be the case that even him(er) has not noticed it. Very interesting.
He/She has probably activated 'Silent Victory' so the victory would only been seen in the logfile.
joblack is offline   Reply With Quote
Old 2009-06-05, 17:25   #84
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101×103 Posts

211·5 Posts
Default

Quote:
Originally Posted by joblack View Post
He/She has probably activated 'Silent Victory' so the victory would only been seen in the logfile.
That is useful if it is a work machine, or a machine given/loaned to a user. "The machine started beeping uncontrolled, so I just turned it off."
Uncwilly is offline   Reply With Quote
Old 2009-06-05, 18:01   #85
akruppa
 
akruppa's Avatar
 
"Nancy"
Aug 2002
Alexandria

2,467 Posts
Default

Maybe there's a simple explanation why Mersenne primes M[I]p[/I] tend to have highly composite p-1. Trivially, 2p-1 and 2p-2 have no common factor, and the latter is 2(2p-1-1) which has a lot of algebraic factors if p-1 is highly composite, and so will have a lot of small prime factors, thus slightly reducing the probability that 2p-1 has small prime factors. The effect can't be very strong, though: divisors of 2p-1 are of form 2kp+1 and few factors of 2p-1-1 will be of this form. Still, it's the only thing I can think of how the number of divisors of p-1 might enter the picture.

If this effect is the reason for the smoother-than-expected p-1 in prime M[I]p[/I], then M[I]p[/I] with smooth p-1should simply have a slightly better chance of surviving trial division, but among the trial-divided candidates, the probability that M[I]p[/I] is prime should be independent of the smoothness of p-1 again.

Alex
akruppa is offline   Reply With Quote
Old 2009-06-05, 18:35   #86
T.Rex
 
T.Rex's Avatar
 
Feb 2004
France

16378 Posts
Default Itanium2

Quote:
Originally Posted by Kevin View Post
Is that on the Itanium, or the Nehalem?
On Itanium2. It is possible I'll be able to use a 8xNehalem Monday ; not sure.
Tony
T.Rex is offline   Reply With Quote
Old 2009-06-05, 19:08   #87
Kevin
 
Kevin's Avatar
 
Aug 2002
Ann Arbor, MI

433 Posts
Default

Quote:
Originally Posted by T.Rex View Post
On Itanium2. It is possible I'll be able to use a 8xNehalem Monday ; not sure.
Tony
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.
Kevin is offline   Reply With Quote
Old 2009-06-05, 20:37   #88
T.Rex
 
T.Rex's Avatar
 
Feb 2004
France

32·103 Posts
Default 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 Arthus-Bertrand: I'm not sure the big-prime hunting will continue for dozens of years...
T.

Last fiddled with by T.Rex on 2009-06-05 at 20:48
T.Rex is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Success R.D. Silverman Factoring 24 2020-01-23 10:36
Is P-1 Success Rate related to RAM Allocated petrw1 PrimeNet 18 2019-08-22 20:20
Another success (not)! ATH Data 133 2012-03-09 17:19
Success again?!? ATH Data 80 2011-11-15 11:40
Success edorajh Lounge 5 2004-08-15 16:51

All times are UTC. The time now is 11:35.


Sat Jan 22 11:35:37 UTC 2022 up 183 days, 6:04, 0 users, load averages: 1.58, 1.23, 1.27

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.

≠ ± ∓ ÷ × · − √ ‰ ⊗ ⊕ ⊖ ⊘ ⊙ ≤ ≥ ≦ ≧ ≨ ≩ ≺ ≻ ≼ ≽ ⊏ ⊐ ⊑ ⊒ ² ³ °
∠ ∟ ° ≅ ~ ‖ ⟂ ⫛
≡ ≜ ≈ ∝ ∞ ≪ ≫ ⌊⌋ ⌈⌉ ∘ ∏ ∐ ∑ ∧ ∨ ∩ ∪ ⨀ ⊕ ⊗ 𝖕 𝖖 𝖗 ⊲ ⊳
∅ ∖ ∁ ↦ ↣ ∩ ∪ ⊆ ⊂ ⊄ ⊊ ⊇ ⊃ ⊅ ⊋ ⊖ ∈ ∉ ∋ ∌ ℕ ℤ ℚ ℝ ℂ ℵ ℶ ℷ ℸ 𝓟
¬ ∨ ∧ ⊕ → ← ⇒ ⇐ ⇔ ∀ ∃ ∄ ∴ ∵ ⊤ ⊥ ⊢ ⊨ ⫤ ⊣ … ⋯ ⋮ ⋰ ⋱
∫ ∬ ∭ ∮ ∯ ∰ ∇ ∆ δ ∂ ℱ ℒ ℓ
𝛢𝛼 𝛣𝛽 𝛤𝛾 𝛥𝛿 𝛦𝜀𝜖 𝛧𝜁 𝛨𝜂 𝛩𝜃𝜗 𝛪𝜄 𝛫𝜅 𝛬𝜆 𝛭𝜇 𝛮𝜈 𝛯𝜉 𝛰𝜊 𝛱𝜋 𝛲𝜌 𝛴𝜎 𝛵𝜏 𝛶𝜐 𝛷𝜙𝜑 𝛸𝜒 𝛹𝜓 𝛺𝜔