A177330 - cp's OEIS frontend

A177330 Least k>0 such that (p*2^k-1)/3 is prime, or zero if no k exists, where p=prime(n).

n	a(n)
1	3
2	0
3	1
4	4
5	1
6	2
7	1
8	4
9	3
10	1
11	2
12	4
13	3
14	4
15	1
16	9107
17	3
18	6
19	2
20	1
21	2
22	4
23	7
24	1
25	6
26	1
27	2
28	1
29	32
30	11
31	4
32	3
33	45
34	24
35	3
36	6
37	8
38	16
39	21
40	3
41	29
42	2
43	1
44	2
45	1
46	4
47	2
48	66
49	1
50	8
51	7
52	5
53	10
54	1
55	5
56	3
57	1
58	14
59	18
60	13
61	6
62	59
63	2
64	3
65	4
66	1
67	18
68	2
69	5
70	4
71	3
72	1
73	6
74	5016
75	8
76	3
77	15
78	14
79	3
80	12
81	3
82	46
83	5
84	2
85	4
86	3
87	5
88	4
89	1
90	2
91	1
92	3

[3, 0, 1, 4, 1, 2, 1, 4, 3, 1, 2, 4, 3, 4, 1, 9107, 3, 6, 2, 1, 2, 4, 7, 1, 6, 1, 2, 1, 32, 11, 4, 3, 45, 24, 3, 6, 8, 16, 21, 3, 29, 2, 1, 2, 1, 4, 2, 66, 1, 8, 7, 5, 10, 1, 5, 3, 1, 14, 18, 13, 6, 59, 2, 3, 4, 1, 18, 2, 5, 4, 3, 1, 6, 5016, 8, 3, 15, 14, 3, 12, 3, 46, 5, 2, 4, 3, 5, 4, 1, 2, 1, 3]

cp's OEIS Frontend

A177330 Least k>0 such that (p*2^k-1)/3 is prime, or zero if no k exists, where p=prime(n).

Table of values

List of values