20200831, 18:03  #12 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
2×3×5×313 Posts 
... ... Easily sniped.

20200831, 18:14  #13  
"Curtis"
Feb 2005
Riverside, CA
3·1,579 Posts 
Quote:
We prefer you didn't. It's cool to post the command you would use (as you also did), so that OP could do it himself if he wasn't so lazy. 

20200831, 18:15  #14 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
2·3·5·313 Posts 
MOD NOTE: next cry of "Fire!" in a cinema theater will be punished by a detention.
People do come to this forum to find news of a, say, next Mersenne prime (which are now prescreened as PRPs), so the next person who will call their thread "Probable prime" and when asked for reasons why that did such a thing would show a patty cake made out of #2, will get that cake on their face and a two week banishment as well. Call it something else, like "I made up a number", or "asking for an advice" or "I don't know how to check this", or whatever. 
20200901, 07:21  #15 
Mar 2018
17×31 Posts 
...but this is almost surely PRP!
(2^36808001)*10^1108031+2^36807991

20200901, 07:32  #16 
Mar 2018
20F_{16} Posts 
...not that's not prp
how about this:
(2^14301361)*10^430514+2^14301351??? I made a stupid mistacke the candidates have the form pg(69660+1360476n) because 69660 is the least N congruent to 215 mod 323 and 0 mod 324 and 6 mod 13 
20200901, 07:48  #17  
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
2·3·5·313 Posts 
Quote:
Divisible by 14437. Correct. How about a 2 weeks ban? 

20200901, 07:51  #18 
Sep 2002
Database er0rr
3·17·71 Posts 

20200901, 07:53  #19 
Mar 2018
20F_{16} Posts 
...i did not...
i did not take into account that N must be 10^m mod 41
let's guess congruent to 1 mod 41 so the candidates must have the form pg(69660+11992595940n) impossible to test! Last fiddled with by enzocreti on 20200901 at 08:01 
20200901, 08:02  #20  
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
2×3×5×313 Posts 
Quote:
There are no guesses in math. log_{10}2 is irrational and just happens to be locally close to 0.3 and that is the only reason that there is some local periodicity of modulos w.r.t. n. This periodicity doesn't hold for larger values of n, so simply stop posting guesses pulled out of your ear (or, as some less polite folks would say, rear). 

20200901, 16:55  #21  
Random Account
Aug 2009
19×101 Posts 
Quote:


Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Probability to find a probable prime  enzocreti  enzocreti  2  20190923 06:13 
Is 2^1028379412^102837931 probable prime?  enzocreti  enzocreti  9  20190916 07:04 
The probable primes  philmoore  Five or Bust  The Dual Sierpinski Problem  388  20190301 04:30 
Probable prime with more than 400k digits  enzocreti  enzocreti  2  20190210 16:17 
probable largest prime.  sudaprime  Miscellaneous Math  11  20180205 08:10 