20180203, 04:27  #1  
"Rashid Naimi"
Oct 2015
Remote to Here/There
2×1,087 Posts 
* Provisional Ranking
Quote:
What are the probabilities of missed Mersenne Primes in ranges in between M45 to M50? Has any of the gaps been scanned by PRP testing exhaustively? Thank you in advance. 

20180203, 06:48  #2  
Sep 2002
Database er0rr
2·7·281 Posts 
Quote:


20180203, 06:54  #3 
Jun 2003
3·11·157 Posts 
I understood the OP's comment as "Have we used the errorchecking capability of the new PRP test to rule out missed primes". I don't think he implied that PRP is faster.

20180203, 08:28  #4 
"Jacob"
Sep 2006
Brussels, Belgium
1755_{10} Posts 
Concerning the original question, why retest exhaustively with PRP ? Almost all exponents between M45 and M50 have been tested with LL. They need a double check, but it would be an enormous waste of computing power and energy to test them all with PRP. The double check should be done with the same test as the first check.
PRP tests (first time check and doublecheck) should only be done on exponents that have not yet been tested with LL. Jacob 
20180203, 09:01  #5 
Undefined
"The unspeakable one"
Jun 2006
My evil lair
2×23×137 Posts 

20180203, 17:09  #6 
Sep 2003
2585_{10} Posts 
Have all the known Mersenne primes been retested with PRP?
Obviously it should work, but it might be a useful sanity check. 
20180204, 02:46  #7 
"Rashid Naimi"
Oct 2015
Remote to Here/There
2×1,087 Posts 
Thank you for all the replies.
I was not aware that the LL test was faster than PRP testing. So am I correct to assume that all candidates below M50 without know factors have been at least once LL tested? Thanks again for your time. 
20180204, 02:50  #8  
Undefined
"The unspeakable one"
Jun 2006
My evil lair
2×23×137 Posts 
By a small amount. The difference is not a big deal.
Quote:
See here: https://www.mersenne.org/report_milestones/ Last fiddled with by retina on 20180204 at 03:24 

20180204, 03:14  #9 
"Rashid Naimi"
Oct 2015
Remote to Here/There
87E_{16} Posts 
Cool link Retina.
Thanks. 
Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Member Ranking.  jwaltos  Forum Feedback  8  20150313 17:01 
Just for fun! A software which can download PrimeNet Ranking  dabaichi  Programming  5  20111228 02:24 
Ranking and Speed  nngs  Lounge  1  20080331 21:23 
RPS Ranking  grobie  Riesel Prime Search  2  20060118 17:56 
Triple ranking report program  dsouza123  Programming  12  20031123 03:10 