A135978 - cp's OEIS frontend

A135978 Primes p such that 2^p-1 has exactly 2 prime factors.

n	a(n)
1	11
2	23
3	37
4	41
5	59
6	67
7	83
8	97
9	101
10	103
11	109
12	131
13	137
14	139
15	149
16	167
17	197
18	199
19	227
20	241
21	269
22	271
23	281
24	293
25	347
26	373
27	379
28	421
29	457
30	487
31	523
32	727
33	809
34	881
35	971
36	983
37	997
38	1061
39	1063

[11, 23, 37, 41, 59, 67, 83, 97, 101, 103, 109, 131, 137, 139, 149, 167, 197, 199, 227, 241, 269, 271, 281, 293, 347, 373, 379, 421, 457, 487, 523, 727, 809, 881, 971, 983, 997, 1061, 1063]

cp's OEIS Frontend

A135978 Primes p such that 2^p-1 has exactly 2 prime factors.

Table of values

List of values