157363domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumbers k such that 10^(2*k+1)-8*10^k-1 is prime.at n=9A183184Emirps p such that, if q is the next emirp after p, p*q mod (p+q) and floor(p*q/(p+q)) are both emirps.at n=6A350884Prime numbersat n=14473