A046067 - cp's OEIS frontend

A046067 Smallest m such that (2n-1)2^m+1 is prime, or -1 if no such value exists.

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	1
7	2
8	1
9	3
10	6
11	1
12	1
13	2
14	2
15	1
16	8
17	1
18	1
19	2
20	1
21	1
22	2
23	2
24	583
25	2
26	1
27	1
28	4
29	2
30	5
31	4
32	1
33	1
34	2
35	1
36	3
37	2
38	1
39	3
40	2
41	1
42	1
43	4
44	2
45	1
46	8
47	2
48	1
49	2
50	1
51	3
52	16
53	1
54	3
55	6
56	1
57	1
58	2
59	3
60	1
61	8
62	6
63	1
64	2
65	3
66	1
67	4
68	1
69	3
70	2
71	1
72	53
73	6
74	8
75	3
76	4
77	1
78	1
79	8
80	6
81	3
82	2
83	1
84	7
85	2
86	8
87	1
88	2
89	2
90	1
91	4
92	1
93	3
94	6
95	1
96	1
97	2
98	4
99	15
100	2

[0, 1, 1, 2, 1, 1, 2, 1, 3, 6, 1, 1, 2, 2, 1, 8, 1, 1, 2, 1, 1, 2, 2, 583, 2, 1, 1, 4, 2, 5, 4, 1, 1, 2, 1, 3, 2, 1, 3, 2, 1, 1, 4, 2, 1, 8, 2, 1, 2, 1, 3, 16, 1, 3, 6, 1, 1, 2, 3, 1, 8, 6, 1, 2, 3, 1, 4, 1, 3, 2, 1, 53, 6, 8, 3, 4, 1, 1, 8, 6, 3, 2, 1, 7, 2, 8, 1, 2, 2, 1, 4, 1, 3, 6, 1, 1, 2, 4, 15, 2]

cp's OEIS Frontend

A046067 Smallest m such that (2n-1)2^m+1 is prime, or -1 if no such value exists.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	1
7	2
8	1
9	3
10	6
11	1
12	1
13	2
14	2
15	1
16	8
17	1
18	1
19	2
20	1
21	1
22	2
23	2
24	583
25	2
26	1
27	1
28	4
29	2
30	5
31	4
32	1
33	1
34	2
35	1
36	3
37	2
38	1
39	3
40	2
41	1
42	1
43	4
44	2
45	1
46	8
47	2
48	1
49	2
50	1
51	3
52	16
53	1
54	3
55	6
56	1
57	1
58	2
59	3
60	1
61	8
62	6
63	1
64	2
65	3
66	1
67	4
68	1
69	3
70	2
71	1
72	53
73	6
74	8
75	3
76	4
77	1
78	1
79	8
80	6
81	3
82	2
83	1
84	7
85	2
86	8
87	1
88	2
89	2
90	1
91	4
92	1
93	3
94	6
95	1
96	1
97	2
98	4
99	15
100	2

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	1
7	2
8	1
9	3
10	6
11	1
12	1
13	2
14	2
15	1
16	8
17	1
18	1
19	2
20	1
21	1
22	2
23	2
24	583
25	2
26	1
27	1
28	4
29	2
30	5
31	4
32	1
33	1
34	2
35	1
36	3
37	2
38	1
39	3
40	2
41	1
42	1
43	4
44	2
45	1
46	8
47	2
48	1
49	2
50	1
51	3
52	16
53	1
54	3
55	6
56	1
57	1
58	2
59	3
60	1
61	8
62	6
63	1
64	2
65	3
66	1
67	4
68	1
69	3
70	2
71	1
72	53
73	6
74	8
75	3
76	4
77	1
78	1
79	8
80	6
81	3
82	2
83	1
84	7
85	2
86	8
87	1
88	2
89	2
90	1
91	4
92	1
93	3
94	6
95	1
96	1
97	2
98	4
99	15
100	2

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	1
7	2
8	1
9	3
10	6
11	1
12	1
13	2
14	2
15	1
16	8
17	1
18	1
19	2
20	1
21	1
22	2
23	2
24	583
25	2
26	1
27	1
28	4
29	2
30	5
31	4
32	1
33	1
34	2
35	1
36	3
37	2
38	1
39	3
40	2
41	1
42	1
43	4
44	2
45	1
46	8
47	2
48	1
49	2
50	1
51	3
52	16
53	1
54	3
55	6
56	1
57	1
58	2
59	3
60	1
61	8
62	6
63	1
64	2
65	3
66	1
67	4
68	1
69	3
70	2
71	1
72	53
73	6
74	8
75	3
76	4
77	1
78	1
79	8
80	6
81	3
82	2
83	1
84	7
85	2
86	8
87	1
88	2
89	2
90	1
91	4
92	1
93	3
94	6
95	1
96	1
97	2
98	4
99	15
100	2