264791domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumbers k such that 4*10^k + 6*R_k - 3 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=36A099005Primes that are the sum of prime factors (with multiplicity) of a triprime which is the concatenation of three consecutive primes.at n=13A386228Prime numbersat n=23212