20190920, 11:53  #1 
Mar 2018
539_{10} Posts 
Probability to find a probable prime
pg(215),pg(69660),pg(92020) and pg(541456) are prp...
215, 69660, 92020 and 541456 are 0 mod 43 and 10^m mod 41... i am trying to find the next pg(43s) probable prime and I am considering the multiples of 43 which are congruent to 1 mod 41 as 69660... a needle in the haystack do you think? Any trick to accelerate the search? Last fiddled with by enzocreti on 20190920 at 11:56 
20190920, 13:43  #2 
Mar 2018
1033_{8} Posts 
candidate
A candidate is:
(2^22346241)*10^672689+2^22346231, no factor upto 10^7 
20190923, 06:13  #3 
Mar 2018
7^{2}·11 Posts 
THE NUMBER IS NOT PRP
Unfortunally the number is composite!

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