696181domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 66.at n=22A031654Primes p such that q-p = 58, where q is the next prime after p.at n=31A204668Prime numbersat n=56269