308309domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes formed by concatenating n with n+1.at n=35A030458Primes p such that the differences between the 5 consecutive primes starting with p are (2,6,6,4).at n=21A078950Primes formed by the concatenation of exactly two consecutive composite numbers.at n=18A342049Prime numbersat n=26667