

A100496


Numbers n such that (2^n+1)^42 is prime.


2




OFFSET

1,2


COMMENTS

Some of the results were computed using the PrimeFormGW (PFGW) primalitytesting program.  Hugo Pfoertner, Nov 14 2019


LINKS

Table of n, a(n) for n=1..9.


EXAMPLE

a(1) = 1 because (2^1+1)^4  2 = 79 is prime and is the first such prime.


MATHEMATICA

Select[Range[5000], PrimeQ[(2^# + 1)^4  2] &]


PROG

(PARI) is(n)=ispseudoprime((2^n+1)^42) \\ Charles R Greathouse IV, Jun 13 2017


CROSSREFS

Cf. A091513, A091514, A093069, A099359.
Cf. A100497, n such that (2^n+1)^42 is semiprime.
Sequence in context: A327107 A075926 A065660 * A110081 A140716 A141393
Adjacent sequences: A100493 A100494 A100495 * A100497 A100498 A100499


KEYWORD

more,nonn


AUTHOR

Jonathan Vos Post, Nov 23 2004


EXTENSIONS

Edited, corrected and extended by Ray Chandler and Hugo Pfoertner, Nov 26 2004


STATUS

approved



