A172041 Primes of the form 2^p-3 with p also prime.

5, 29, 536870909, 13803492693581127574869511724554050904902217944340773110325048447598589

Offset

1,1

Comments

Next two terms are 2^42689-3 and 2^69337-3.

Subsequence of A050415.

Corresponding p are the primes in A050414.

The next term has 12851 digits. - Harvey P. Dale, Aug 27 2023

Links

Table of n, a(n) for n=1..4.

Mathematica

Select[Table[2^p-3, {p, Prime[Range[100]]}], PrimeQ] (* Harvey P. Dale, Aug 27 2023 *)

Crossrefs

Sequence in context: A056869 A228028 A237256 * A187605 A266569 A098346

Adjacent sequences: A172038 A172039 A172040 * A172042 A172043 A172044

Keyword

nonn

Author

Vincenzo Librandi, Jan 24 2010

Extensions

Definition clarified by R. J. Mathar, Jan 28 2010

Status

approved