, 2, . : (3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43), (59, 61), (71, 73).
-, (3, 5), (). 30[1] , , (11, 13), (17, 19), (29, 31).
(3,5,7) , (5, 7, 11, 13) (11, 13, 17, 19).
, , -: () (). : (5, 7, 11), (7, 11, 13), (11, 13, 17), (13, 17, 19), (17, 19, 23).
() : (5, 7, 11, 13), (11, 13, 17, 19), (101, 103, 107, 109), (191, 193, 197, 199). 30 , , (11, 13, 17, 19), 210 (101, 103, 107, 109), (191, 193, 197, 199).
() : (7, 11, 13, 17, 19, 23), (97, 101, 103, 107, 109, 113). 210 , , (97, 101, 103, 107, 109, 113).
. .