A282565 - cp's OEIS frontend

A282565 a(n) is the largest prime p < 2^n such that p + 2^n is also prime.

n	a(n)
2	3
3	5
4	13
5	29
6	43
7	113
8	223
9	509
10	907
11	2003
12	4051
13	8171
14	16333
15	32603
16	65437
17	130649
18	262027
19	524261
20	1048507
21	2097047
22	4194277
23	8388209
24	16776481
25	33554201
26	67108753
27	134217401
28	268435273
29	536869631
30	1073741719
31	2147483549
32	4294966477
33	8589934307
34	17179868383

[3, 5, 13, 29, 43, 113, 223, 509, 907, 2003, 4051, 8171, 16333, 32603, 65437, 130649, 262027, 524261, 1048507, 2097047, 4194277, 8388209, 16776481, 33554201, 67108753, 134217401, 268435273, 536869631, 1073741719, 2147483549, 4294966477, 8589934307, 17179868383]

cp's OEIS Frontend

A282565 a(n) is the largest prime p < 2^n such that p + 2^n is also prime.

Table of values

List of values