324491domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) is the least positive integer in base n that when multiplied by 2n-1 will contain only the digits 0 and 1.at n=27A337624Primes that are the sum of prime factors (with multiplicity) of a triprime which is the concatenation of three consecutive primes.at n=16A386228Prime numbersat n=27961