Smallest prime divisor of Kummer numbers ( = primorials - 1), or 1 if no such prime exists.

Terms

a(0) =1a(1) =5a(2) =29a(3) =11a(4) =2309a(5) =30029a(6) =61a(7) =53a(8) =37a(9) =79a(10) =228737a(11) =229a(13) =141269a(14) =191a(15) =87337a(16) =27600124633a(17) =1193a(18) =163a(19) =260681003321a(20) =313a(21) =163a(22) =139a(24) =66683a(26) =15649a(27) =17515703a(28) =719a(29) =295201a(30) =15098753a(31) =10172884549a(33) =4871