20070316, 14:12  #1 
Feb 2006
51_{10} Posts 
Triple test of m2 to m499979
Hi
I wantet to see how fast a standard coporation desktop computer is compared to the early mersenne prime hunting, so i did a search from m2 to m499979. The list of primes in the worktodo file was generated from a home grown code, but tested against the "official" list from primes.utm.edu. A ",70" was then added to all lines to avoid LL testing. The result file (ZIP compressed) is 1,2MB so it exides the max limit for upload. Is any one intersted in the file? Should I mail it to George? Eivind 
20070317, 22:01  #2 
Dec 2002
827 Posts 
Can you be more specific about what exactly you did? Which exponents did you test? All exponents in that range that have no known factor? And what test did you do on those exponents? a LucasLehmer test?

20070318, 16:42  #3 
P90 years forever!
Aug 2002
Yeehaw, FL
2×11×349 Posts 

20070319, 01:45  #4 
"Richard B. Woods"
Aug 2002
Wisconsin USA
7692_{10} Posts 
I presume you mean that the ",70" was added to avoid trial factoring (by indicating that TF had already been performed unsuccessfully up to 2^{70} for each exponent), so that only the LL tests were performed.

20070321, 09:54  #5  
Feb 2006
3×17 Posts 
Hi
Quote:
The times was about 20 sec/candidate in the beginning and 315 sec/candidate in the end. Quote:
My conclusion is that a standard desktop computer with Primes95 outpreforms the stade of the art hardware 1315 years agao (Slowinski, Cray2, 19921996). If I continued I would find the m34 (1257787) faster than they did The Cray2 was supassed in 1990 so in 1992 this was still a verry powerfull machine. So by the time my doughter turns 18 I might have a BlueGene/L or a Red Storm sitting on my desk. Jum jum I wonder, if it will be optical? Eivind 

20110130, 02:11  #6  
May 2004
New York City
108B_{16} Posts 
retest
Quote:
tell us just how much P95 runs faster over the years 19952011 ? 

20110130, 03:41  #7  
Aug 2002
North San Diego County
5×139 Posts 
Quote:
1024K FFT P120 5167.51 vs. i7 x980@4050 10.44 TF65 788.08 vs. <3.41 

20110130, 04:23  #8 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
2·13·389 Posts 
As of this time GIMPS "Competition" has quad checked all numbers up to 465133 @ ~8750 sec per LL.

20110130, 06:11  #9  
A Sunny Moo
Aug 2007
USA (GMT5)
3·2,083 Posts 
Quote:
Quote:


20110130, 17:27  #10 
May 2004
New York City
5·7·11^{2} Posts 
His compliment to GIMPS leads to this at the moment:
Code:
M(20996011) proven to be 40th Mersenne Prime July 11, 2010. Almost 7 years after discovering M(20996011), GIMPS finished doublechecking every smaller Mersenne number. Since no primes were found, the "40th known Mersenne prime" can now be simply called the "40th Mersenne prime". Congratulations and thanks to all the GIMPS members that perform this less glamorous doublechecking work. Last fiddled with by davar55 on 20110130 at 17:28 
20110131, 08:00  #11  
"Richard B. Woods"
Aug 2002
Wisconsin USA
2^{2}·3·641 Posts 
Quote:
I like it. It sounds less impersonal. "Community" captures the sense of interaction between human participants, such as in this very forum. It doesn't define participation in terms of only the hardware/software. Perhaps the "massive" will need to go. What's "massive" today will be "piddling" tomorrow. OTOH, as long as GIMPS is comparable to the Top 50 Supercomputer list members ... 

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