816817domain: NPropertiesPrimalityPrimeyesAppears in sequencesFirst prime of a pair, formed by concatenating n, n+1, the second prime (not shown) formed by concatenating n+2, n+3.at n=11A156121Primes formed by concatenating n with n+1 and by concatenating n+2 with n+3.at n=22A256176Prime numbersat n=65178