143827domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes with palindromic primes indices.at n=28A124173Primes p of the form 4m+3 for which there are exactly as many primitive roots modulo p in the interval [0,p/2] as in the interval [p/2,p].at n=51A172490Prime numbersat n=13331