A374953 - cp's OEIS frontend

A374953 Numbers k such that 2^(2^k-2) == 1 (mod k^2) and 2^(k-1) =/= 1 (mod k).

n	a(n)
1	66709
2	951481
3	2215441
4	2847421
5	4111381
6	4869757
7	28758601
8	81844921
9	124187581
10	300510001
11	306197821
12	1221936841
13	9763146541
14	10370479321
15	13560714361
16	14387344201
17	16287076081
18	16956342901
19	18820810297
20	19245374461
21	22732640101
22	26946809137
23	27119213281
24	29217386881

[66709, 951481, 2215441, 2847421, 4111381, 4869757, 28758601, 81844921, 124187581, 300510001, 306197821, 1221936841, 9763146541, 10370479321, 13560714361, 14387344201, 16287076081, 16956342901, 18820810297, 19245374461, 22732640101, 26946809137, 27119213281, 29217386881]

cp's OEIS Frontend

A374953 Numbers k such that 2^(2^k-2) == 1 (mod k^2) and 2^(k-1) =/= 1 (mod k).

Table of values

List of values