341057domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p of the form 4*n^2 + 1 such that 4*p^2+1 is also prime.at n=11A121834Lower twin primes p1 such that p1-1 is a square.at n=19A145824Honaker primes of the form k^2 + 1.at n=7A176790Primes p of form n^2 + 1 such that p+2 and p+6 are also prime.at n=8A200992Prime numbersat n=29270