1112339domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that both p and p^2 contain "123" as a substring.at n=11A268279Pseudo-safe-primes: numbers n = 2m+1 with 2^m congruent to n+1 or 3n-1 modulo m*n, but m composite.at n=19A300193Prime numbersat n=86627