A103782 - cp's OEIS frontend

A103782 a(n) = minimal m >= 0 that makes primorial P(n)*2^m-1 prime.

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

[0, 0, 1, 0, 0, 1, 1, 2, 3, 12, 1, 0, 22, 2, 4, 13, 12, 6, 1, 4, 1, 4, 0, 2, 9, 5, 6, 2, 1, 9, 17, 22, 7, 19, 73, 23, 12, 5, 27, 33, 64, 33, 5, 7, 41, 44, 35, 29, 3, 19, 6, 26, 5, 11, 9, 33, 34, 16, 63, 46, 8, 4, 24, 48, 0, 11, 0, 26, 6, 25, 17, 31, 6, 46, 33, 46, 17, 8, 61, 12, 23, 76, 20, 17]

cp's OEIS Frontend

A103782 a(n) = minimal m >= 0 that makes primorial P(n)*2^m-1 prime.

Table of values

List of values

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

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

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