A143665 - cp's OEIS frontend

A143665 a(n) is the least prime such that the multiplicative order of 5 mod a(n) equals n.

n	a(n)
1	2
2	3
3	31
4	13
5	11
6	7
7	19531
8	313
9	19
10	521
11	12207031
12	601
13	305175781
14	29
15	181
16	17
17	409
18	5167
19	191
20	41
21	379
22	23
23	8971
24	390001
25	101
26	5227
27	109
28	234750601
29	59
30	61
31	1861
32	2593
33	199
34	3061
35	211
36	37
37	149
38	761
39	79
40	241
41	2238236249
42	43
43	1644512641
44	89
45	1171
46	47

[2, 3, 31, 13, 11, 7, 19531, 313, 19, 521, 12207031, 601, 305175781, 29, 181, 17, 409, 5167, 191, 41, 379, 23, 8971, 390001, 101, 5227, 109, 234750601, 59, 61, 1861, 2593, 199, 3061, 211, 37, 149, 761, 79, 241, 2238236249, 43, 1644512641, 89, 1171, 47]

cp's OEIS Frontend

A143665 a(n) is the least prime such that the multiplicative order of 5 mod a(n) equals n.

Table of values

List of values