275201domain: 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 41.at n=26A031629Odd prime factors of generalized Fermat numbers of the form 3^(2^m) + 1 with m >= 0.at n=8A273945Prime numbersat n=24055