A103310 - cp's OEIS frontend

A103310 Largest prime primitive root of n that is less than n, or 0 if none exists.

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

[0, 0, 0, 2, 3, 3, 5, 5, 0, 5, 7, 7, 0, 11, 5, 0, 0, 11, 11, 13, 0, 0, 19, 19, 0, 23, 19, 23, 0, 19, 0, 17, 0, 0, 31, 0, 0, 19, 29, 0, 0, 29, 0, 29, 0, 0, 43, 43, 0, 47, 47, 0, 0, 41, 47, 0, 0, 0, 47, 47, 0, 59, 53, 0, 0, 0, 0, 61, 0, 0, 0, 67, 0, 59, 61, 0, 0, 0, 0, 59, 0, 59, 71, 79, 0, 0, 73]

cp's OEIS Frontend

A103310 Largest prime primitive root of n that is less than n, or 0 if none exists.

Table of values

List of values

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

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

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