A268130 - cp's OEIS frontend

A268130 Primes p of the form sigma(2^k + 1) - 1 for some k >= 0.

n	a(n)
1	2
2	3
3	5
4	17
5	47
6	83
7	257
8	1301
9	65537
10	174767
11	5048231
12	51322664447
13	188313058624991
14	4768522825659911
15	3148244377723715041631
16	211635519858089932125000235391
17	906780938207203620571208267879698943
18	6392739029893008727817055462596999999

[2, 3, 5, 17, 47, 83, 257, 1301, 65537, 174767, 5048231, 51322664447, 188313058624991, 4768522825659911, 3148244377723715041631, 211635519858089932125000235391, 906780938207203620571208267879698943, 6392739029893008727817055462596999999]

cp's OEIS Frontend

A268130 Primes p of the form sigma(2^k + 1) - 1 for some k >= 0.

Table of values

List of values