43753domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumbers k such that 8*10^k + 3*R_k is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=12A056723Primes p such that reversal(p) - 13 is a square.at n=35A176371Prime numbersat n=4556