A112927 - cp's OEIS frontend

A112927 a(n) is the least prime such that the multiplicative order of 2 mod a(n) equals n, or a(n)=1 if no such prime exists.

n	a(n)
1	1
2	3
3	7
4	5
5	31
6	1
7	127
8	17
9	73
10	11
11	23
12	13
13	8191
14	43
15	151
16	257
17	131071
18	19
19	524287
20	41
21	337
22	683
23	47
24	241
25	601
26	2731
27	262657
28	29
29	233
30	331
31	2147483647
32	65537
33	599479
34	43691
35	71
36	37
37	223
38	174763
39	79
40	61681
41	13367
42	5419
43	431
44	397
45	631
46	2796203
47	2351
48	97
49	4432676798593
50	251
51	103
52	53
53	6361
54	87211

[1, 3, 7, 5, 31, 1, 127, 17, 73, 11, 23, 13, 8191, 43, 151, 257, 131071, 19, 524287, 41, 337, 683, 47, 241, 601, 2731, 262657, 29, 233, 331, 2147483647, 65537, 599479, 43691, 71, 37, 223, 174763, 79, 61681, 13367, 5419, 431, 397, 631, 2796203, 2351, 97, 4432676798593, 251, 103, 53, 6361, 87211]

cp's OEIS Frontend

A112927 a(n) is the least prime such that the multiplicative order of 2 mod a(n) equals n, or a(n)=1 if no such prime exists.

Table of values

List of values