A128164 - cp's OEIS frontend

A128164 Least k > 2 such that (n^k - 1)/(n-1) is prime, or 0 if no such prime exists.

n	a(n)
2	3
3	3
4	0
5	3
6	3
7	5
8	3
9	0
10	19
11	17
12	3
13	5
14	3
15	3
16	0
17	3
18	25667
19	19
20	3
21	3
22	5
23	5
24	3
25	0
26	7
27	3
28	5
29	5
30	5
31	7
32	0
33	3
34	13
35	313
36	0
37	13
38	3
39	349
40	5
41	3
42	1319
43	5
44	5
45	19
46	7
47	127
48	19
49	0
50	3
51	4229
52	103
53	11
54	3
55	17
56	7
57	3
58	41
59	3
60	7
61	7
62	3
63	5
64	0
65	19
66	3
67	19
68	5
69	3
70	29
71	3
72	7
73	5
74	5
75	3
76	41
77	3
78	3
79	5
80	3
81	0
82	23
83	5
84	17
85	5
86	11
87	7
88	61
89	3
90	3

[3, 3, 0, 3, 3, 5, 3, 0, 19, 17, 3, 5, 3, 3, 0, 3, 25667, 19, 3, 3, 5, 5, 3, 0, 7, 3, 5, 5, 5, 7, 0, 3, 13, 313, 0, 13, 3, 349, 5, 3, 1319, 5, 5, 19, 7, 127, 19, 0, 3, 4229, 103, 11, 3, 17, 7, 3, 41, 3, 7, 7, 3, 5, 0, 19, 3, 19, 5, 3, 29, 3, 7, 5, 5, 3, 41, 3, 3, 5, 3, 0, 23, 5, 17, 5, 11, 7, 61, 3, 3]

cp's OEIS Frontend

A128164 Least k > 2 such that (n^k - 1)/(n-1) is prime, or 0 if no such prime exists.

Table of values

List of values