
Curios:
Curios Search:
Participate: 
166 is the smallest number such that the number and its reversal are both congruent to 1 mod p for the same set of some three distinct odd primes (166 = 661 = 1 mod (3, 5, 11)). [Thoms]
166!1 is a factorial minus one prime. [Dobb] The smallest Smith number that is prime when reversed (661), turned upside down (991), and reversedthenturned upside down (199). You get the next case by inserting a zero between the digits (10606). [Capelle]
Prime Curios! © 20002018 (all rights
reserved)
privacy statement
