A238856 - cp's OEIS frontend

A238856 Number of digits of the largest right-truncatable reversible prime in base n.

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

[0, 3, 3, 4, 3, 4, 5, 4, 4, 6, 4, 6, 6, 6, 6, 5, 4, 7, 6, 7, 5, 6, 5, 8, 6, 6, 6, 6, 7, 7, 6, 6, 8, 6, 8, 7, 8, 8, 7, 8, 7, 8, 8, 8, 8, 7, 7, 9, 9, 8, 7, 8, 10, 10, 9, 8, 6, 9, 8, 7, 9, 9, 9, 9, 11, 8, 7, 9, 10, 9, 10, 9, 9, 11, 10, 10, 9, 9, 8, 9, 9, 8, 10, 10, 10, 9, 9, 9, 10, 11]

cp's OEIS Frontend

A238856 Number of digits of the largest right-truncatable reversible prime in base n.

Table of values

List of values

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

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

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