115603domain: NPropertiesPrimalityPrimeyesAppears in sequencesTerms in A006512 containing the digit "6" at least once, such that changing every "6" to a "9" and vice versa yields a larger term in A006512.at n=20A123211Primes p such that p+d is composite for all divisors d of p^2-1.at n=3A295818Prime numbersat n=10923