A132198 a(n) is the least prime >= 2^(2^n).

2, 5, 17, 257, 65537, 4294967311, 18446744073709551629, 340282366920938463463374607431768211507, 115792089237316195423570985008687907853269984665640564039457584007913129640233

Offset: 0

Author

Leroy Quet, Nov 05 2007

Keywords

• nonn

Comments

The next term has 155 digits. - Harvey P. Dale, Aug 31 2016

For further terms, consult A097521 or A129786. - Jeppe Stig Nielsen, Nov 18 2019

Crossrefs

Cf. A019434, A097521, A129786.

Programs

Maple

2,seq(nextprime(2^(2^n)),n=1..8); # Emeric Deutsch, Nov 26 2007

Mathematica

Join[{2},NextPrime/@(2^(2^Range[8]))] (* Harvey P. Dale, Aug 31 2016 *)

Extensions

More terms from Emeric Deutsch, Nov 26 2007