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 2020-06-17, 10:45 #2 enzocreti   Mar 2018 10000100102 Posts Pg(92020) pg(69660) and pg(541456) Pg(92020) pg(69660) and pg(541456) are primes 92020 541456 69660 are 10^m mod 41 and multiple of 43 541456 is multiple of 787 92020 and 69660 are congruent to 10^s mod (787+456*r) for some nonnegative integer s and r So 92020 and 69660 are congruent to 10^s modulo a prime of the form 787+456*r 92020 is infact congruent to 10 mod 3067 which is a prime of the form 787+456*r 69660 is congruent to 10^0 mod 1699 which is a prime of the form 787+456*r I think that the prime 331 is involved in some way in these primes. Infact 787=331+456 I note that pg(331259) is also prime... 69660 is congruent to 516 mod (67*3*43) 516=163+456*2-559 92020 and 541456 are congruent to 559*10 mod (67*43*3) Pg(331259) is probable prime. 331259 is prime and congruent to 23 mod 108. (331259-23)/108=3067 which is the above prime of the form 331+456k Mod note: Thread moved to here from Blogorrhea Astounding fact: pg(92020) is probable prime Pg(92020+239239=331259) is probable prime 92020 and 331259 are congruent to 5 mod 239 Last fiddled with by enzocreti on 2020-06-18 at 18:17