A377938 - cp's OEIS frontend

A377938 a(n) is the least k > n such that n is a primitive root modulo k, or -1 if there is no such k.

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

[2, 3, 4, -1, 6, 11, 10, 11, -1, 17, 13, 17, 19, 17, 19, -1, 22, 29, 22, 23, 23, 25, 25, 31, -1, 29, 29, 41, 34, 41, 34, 37, 38, 41, 37, -1, 46, 47, 47, 47, 47, 59, 46, 47, 47, 67, 49, 53, -1, 53, 53, 59, 62, 59, 58, 59, 67, 73, 61, 73, 67, 71, 67, -1, 71, 79, 71, 71, 71, 79, 82, 83, 83, 79, 79]

cp's OEIS Frontend

A377938 a(n) is the least k > n such that n is a primitive root modulo k, or -1 if there is no such k.

Table of values

List of values

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

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

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