A321323 Numbers k such that k^(2^20) + 1 is prime (a generalized Fermat prime).

1, 919444, 1059094, 1951734, 1963736

Offset

1,2

Links

Table of n, a(n) for n=1..5.

Chris K. Caldwell, The Prime Database: 919444^1048576 + 1

Chris K. Caldwell, The Prime Database: 1059094^1048576 + 1

Chris K. Caldwell, The Prime Database: ?^1048576 + 1

Crossrefs

Cf. A056993, A005574, A000068, A006314, A006313, A006315, A006316, A056994, A056995, A057465, A057002, A088361, A088362, A226528, A226529, A226530, A251597, A253854, A244150, A243959.

Sequence in context: A256903 A185532 A360907 * A156428 A251954 A098208

Adjacent sequences: A321320 A321321 A321322 * A321324 A321325 A321326

Keyword

nonn,hard,more

Author

Jeppe Stig Nielsen, Nov 04 2018

Extensions

a(4) from Jeppe Stig Nielsen, Aug 31 2022

a(5) from Jeppe Stig Nielsen, Oct 21 2022

Status

approved