661673domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes that are concatenations of two consecutive primes.at n=22A030461Primes which are a concatenation of at least two consecutive primes.at n=28A068655Juxtaposition of prime(2n-1) and prime(2n) is a prime.at n=13A152521Prime numbersat n=53695