A123487 - cp's OEIS frontend

A123487 Smallest prime q such that (q^p-1)/(q-1) is prime, where p = prime(n); or 0 if no such prime q exists.

n	a(n)
1	2
2	2
3	2
4	2
5	5
6	2
7	2
8	2
9	113
10	151
11	2
12	61
13	53
14	89
15	5
16	307
17	19
18	2
19	491
20	3
21	11
22	271
23	41
24	2
25	271
26	359
27	3
28	2
29	79
30	233
31	2
32	7
33	13
34	11
35	5
36	29
37	71
38	139
39	127
40	139
41	2003
42	5
43	743
44	673
45	593
46	383
47	653
48	661
49	251
50	6389
51	2833
52	223
53	163
54	37
55	709
56	131
57	41
58	2203
59	941
60	2707
61	13
62	1283
63	383

[2, 2, 2, 2, 5, 2, 2, 2, 113, 151, 2, 61, 53, 89, 5, 307, 19, 2, 491, 3, 11, 271, 41, 2, 271, 359, 3, 2, 79, 233, 2, 7, 13, 11, 5, 29, 71, 139, 127, 139, 2003, 5, 743, 673, 593, 383, 653, 661, 251, 6389, 2833, 223, 163, 37, 709, 131, 41, 2203, 941, 2707, 13, 1283, 383]

cp's OEIS Frontend

A123487 Smallest prime q such that (q^p-1)/(q-1) is prime, where p = prime(n); or 0 if no such prime q exists.

Table of values

List of values