20120313, 09:02  #1 
2·3^{2}·13·19 Posts 
Can I specify the range to search the Mersenne Prime?
Can I specify the range to search the Mersenne Prime?

20120313, 11:33  #2 
Account Deleted
"Tim Sorbera"
Aug 2006
San Antonio, TX USA
17·251 Posts 
Yes, at http://www.mersenne.org/manual_assignment/ (make sure you're logged in first to associate the reservation with your account) you can specify the exponent range you'd like to reserve.
Last fiddled with by MiniGeek on 20120313 at 11:36 
20120313, 13:51  #3  
Nov 2003
1D24_{16} Posts 
Quote:
A novice user should not reserve more than one number. 

20120313, 14:04  #4  
"Tapio Rajala"
Feb 2010
Finland
3^{2}×5×7 Posts 
Quote:
Although by reserving one number you are also reserving a range consisting of one number, so... In any case, the meaning of MiniGeeks reply was evident once you follow the link (as the OP will obviously do). 

20120313, 14:50  #5 
1416_{10} Posts 

20120313, 17:05  #6 
"Forget I exist"
Jul 2009
Dumbassville
10000011000000_{2} Posts 
from what I've heard here and there,it depends on the size of the exponent, if it's a LL, DC LL, TF, or P1, the machine it's done on, and it also depends on what you call a long time.
Last fiddled with by science_man_88 on 20120313 at 17:07 
20120313, 17:18  #7 
160B_{16} Posts 
Just only test the M47, how long the time it will take? One day , or a week?

20120313, 17:34  #8 
Romulan Interpreter
Jun 2011
Thailand
5×17×109 Posts 
Depending on the exponent you choose and the hardware you have, it could take between few minutes (to prove the number composite, if you are lucky) and few years. We could help you better if you say what computer you have and what software you intend to use. If you don't know the last, then ask.

20120313, 22:30  #9  
"Lucan"
Dec 2006
England
2×3×13×83 Posts 
Quote:
Quote:


20120314, 09:53  #10  
"Brian"
Jul 2007
The Netherlands
7×467 Posts 
Quote:
But a ballpark for the current wavefront of firsttime Lucas Lehmer tests (typical exponent just over 50 million) ranges from a week or two for top quality hardware running 24 hours a day, through to maybe 6 months for modest hardware running only when you are using your computer. It would take me 6 months to test a 50M exponent. 

20120314, 11:15  #11  
2^{3}×3×7×37 Posts 
Quote:


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