The only proven Riesel numbers below one million have covering sets as follows:* 509203×2"n" − 1 has covering set {3, 5, 7, 13, 17, 241}* 762701×2"n" − 1 has covering set {3, 5, 7, 13, 17, 241}* 777149×2"n" − 1 has covering set {3, 5, 7, 13, 19, 37, 73}* 790841×2"n" − 1 has covering set {3, 5, 7, 13, 19, 37, 73}* 992077×2"n" − 1 has covering set {3, 5, 7, 13, 17, 241}.
Известные числа Ризеля меньше одного миллиона имеют следующие покрывающие множества:* 509 203·2n − 1: {3, 5, 7, 13, 17, 241};* 762 701·2n − 1: {3, 5, 7, 13, 17, 241};* 777 149·2n − 1: {3, 5, 7, 13, 19, 37, 73};* 790 841·2n − 1: {3, 5, 7, 13, 19, 37, 73};* 992 077·2n − 1: {3, 5, 7, 13, 17, 241}.