A064721 Potential Sierpiński numbers: integers for which the smallest m > 2^10 in A040076 such that n*2^m+1 is prime (A050921).

383, 766, 881, 1532, 1643, 1762, 2897, 3061, 3064, 3286, 3443, 3524, 3829, 4847, 4861, 5297, 5359, 5794, 5897, 6122, 6128, 6319, 6572, 6886, 7013, 7352, 7493, 7651, 7658, 7909, 7957, 8119, 8269, 8423, 8543, 8929, 9323, 9694, 9722

Offset

1,1

Comments

The first confirmed Sierpiński number is 78557.

Links

Table of n, a(n) for n=1..39.

Mathematica

Do[m = 0; While[m <= 2^10 && !PrimeQ[n*2^m + 1], m++ ]; If[m > 2^10, Print[n]], {n, 1, 10^4} ]

Crossrefs

Cf. A040076, A050921.

Sequence in context: A015861 A072385 A045122 * A252060 A046014 A342065

Adjacent sequences: A064718 A064719 A064720 * A064722 A064723 A064724

Keyword

nonn

Author

Robert G. Wilson v, Oct 16 2001

Status

approved