1071937domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) is the least prime beginning with prime(n) such that the concatenation a(1)a(2)...a(n) is a prime.at n=27A090510Lesser of the Gridgeman pairs in base 2 in increasing order: pairs of primes palindromic in base 2 which differ only in their middle digits.at n=6A246870Prime numbersat n=83693