20141219, 14:11  #1 
Jul 2014
3×149 Posts 
probabilty of finding a mersenne prime
Hi,
when I get some assignments from the GIMPS server I get an approximate probabilty of finding a MP. Does anyone know how the odds are worked out. My guess is that it uses the PNT. William 
20141219, 16:26  #2  
Account Deleted
"Tim Sorbera"
Aug 2006
San Antonio, TX USA
4,271 Posts 
http://www.mersenne.org/various/math.php mentions this at the end of the LL section.
Quote:


20141219, 19:15  #3 
Jul 2014
3·149 Posts 
thanks

20141219, 20:50  #4 
P90 years forever!
Aug 2002
Yeehaw, FL
2^{5}×3^{5} Posts 
Prime95 also assumes if P1 has been run it had a 3 or 4% chance of finding a factor (I'd have to look at the code). This improves your chances that the LL test will show the Mersenne number to be prime.

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