1047511domain: NPropertiesPrimalityPrimeyesAppears in sequencesGreatest number (in decimal representation) with n nonprime substrings in base-4 representation (substrings with leading zeros are considered to be nonprime).at n=28A217114Primes of the form k!3 - 59049, where k!3 is the triple factorial number (A007661).at n=0A289825Prime numbersat n=81952