102559domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p(x) satisfying the following conditions: (a) A082882(x)=1; (b) {p(x),p(x+1)} are not twin primes; (c) values of A075860(j) for j composites between these two non-twin primes are identical.at n=25A082883Irregular primes with irregularity index four.at n=8A219332Prime numbersat n=9821