A046268 - cp's OEIS frontend

A046268 Largest prime substring in 2^n (or 0 if none exist).

n	a(n)
0	0
1	2
2	0
3	0
4	0
5	3
6	0
7	2
8	5
9	5
10	2
11	2
12	409
13	19
14	163
15	7
16	6553
17	131
18	2621
19	5
20	857
21	971
22	419
23	83
24	1677721
25	5443
26	71
27	1342177
28	43
29	709
30	107
31	83
32	4294967
33	89
34	171798691
35	3597383
36	6871947673
37	3743895347
38	779069
39	54975581
40	511627
41	99023
42	4398046511
43	79609
44	18604441
45	883

[0, 2, 0, 0, 0, 3, 0, 2, 5, 5, 2, 2, 409, 19, 163, 7, 6553, 131, 2621, 5, 857, 971, 419, 83, 1677721, 5443, 71, 1342177, 43, 709, 107, 83, 4294967, 89, 171798691, 3597383, 6871947673, 3743895347, 779069, 54975581, 511627, 99023, 4398046511, 79609, 18604441, 883]

cp's OEIS Frontend

A046268 Largest prime substring in 2^n (or 0 if none exist).

Table of values

List of values