A046068 - cp's OEIS frontend

A046068 Second smallest m such that (2n-1)2^m+1 is prime, or -1 if no such value exists.

n	a(n)
1	1
2	2
3	3
4	4
5	2
6	3
7	8
8	2
9	15
10	10
11	4
12	9
13	4
14	4
15	3
16	60
17	6
18	3
19	4
20	2
21	11
22	6
23	9
24	1483
25	6
26	3
27	5
28	8
29	3
30	11
31	12
32	4
33	3
34	6
35	2
36	5
37	6
38	3
39	7
40	10
41	4
42	5
43	6
44	6
45	7
46	168
47	4
48	3
49	4
50	2
51	9
52	18
53	2
54	7
55	14
56	4
57	5
58	12
59	4
60	3
61	12
62	8
63	5
64	12
65	5
66	3
67	6
68	2
69	27
70	14
71	3
72	77
73	16
74	11
75	7
76	20
77	2
78	7
79	12
80	7
81	5
82	4
83	2
84	103
85	14
86	9
87	13
88	4

[1, 2, 3, 4, 2, 3, 8, 2, 15, 10, 4, 9, 4, 4, 3, 60, 6, 3, 4, 2, 11, 6, 9, 1483, 6, 3, 5, 8, 3, 11, 12, 4, 3, 6, 2, 5, 6, 3, 7, 10, 4, 5, 6, 6, 7, 168, 4, 3, 4, 2, 9, 18, 2, 7, 14, 4, 5, 12, 4, 3, 12, 8, 5, 12, 5, 3, 6, 2, 27, 14, 3, 77, 16, 11, 7, 20, 2, 7, 12, 7, 5, 4, 2, 103, 14, 9, 13, 4]

cp's OEIS Frontend

A046068 Second smallest m such that (2n-1)2^m+1 is prime, or -1 if no such value exists.

Table of values

List of values