20201007, 02:25  #12  
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
21735_{8} Posts 
Quote:
Don't run an LL. Use Prime95 v30 and run it as a PRP. PRP has better error checking and recovery, plus it generates a way for us to do a rapid verification and not have to double check the test. Let Prime95 submit the results automatically. 

20201007, 02:57  #13 
Jan 2020
235_{8} Posts 
So under Advanced:
Test, Time, P  1, ECM which 1 is the good choice to run? 
20201007, 03:36  #14 
"Curtis"
Feb 2005
Riverside, CA
3×5×307 Posts 

20201007, 03:43  #15 
Jan 2020
157 Posts 

20201007, 04:24  #16 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
23DD_{16} Posts 
.

20201007, 07:20  #17 
Jan 2020
157 Posts 
I need a screenshot of prime95 running the PRP test for a specific Mersenne exponent such as 103,374,163 which buttons should I click step by step?

20201007, 09:33  #18  
Romulan Interpreter
Jun 2011
Thailand
2^{4}·571 Posts 
Quote:
If you can't be bothered to follow links, why should we be bothered to explain the math again and again? 

20201007, 09:38  #19  
Jan 2020
157 Posts 
Quote:
M103374163 > No factors below 2^74 M103374613 and M103374631 are both composite numbers because they have factors on that list. Last fiddled with by tuckerkao on 20201007 at 09:41 

20201007, 09:45  #20 
Romulan Interpreter
Jun 2011
Thailand
2^{4}×571 Posts 
The argument was about the "math" link from Uncwilly (post #9), which explains in layman terms what is a residue, why is stored, what's a shift, etc.
Last fiddled with by LaurV on 20201007 at 09:46 
20201007, 09:47  #21  
Jan 2020
157_{10} Posts 
Quote:
What I didn't realize, why not using LL test? Where's the PRP test? When I click to test a specific exponent, it always run as LL. Last fiddled with by tuckerkao on 20201007 at 10:00 

20201007, 10:02  #22 
Romulan Interpreter
Jun 2011
Thailand
2^{4}·571 Posts 
PRP test is the "new fashion", having the advantage that (with the last development in theory) the doublecheck is not needed anymore (or it can be done much faster), as well as the running of the test effectively, is safer for hardware errors. The disadvantage is that a PRP test will not say for sure if a number is prime (like LL test does), it will only say for sure if the number is composite, but say only probabilistically if a number is prime. If such number is found, for which the PRP test says "this number has a high probability to be prime", then a LL test still has to be run for that number.
For the scope of this discussion (residues, shifts, factoring, etc), LL test and PRP test means the same thing. When you read that math page, every time you read "LL test", you can substitute in your mind with "PRP Test". The work similar. Last fiddled with by LaurV on 20201007 at 10:03 
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