A104912 Numbers k such that the string 9876543210k is prime.

29, 47, 61, 89, 97, 217, 229, 299, 361, 379, 389, 419, 461, 463, 467, 533, 637, 643, 649, 701, 707, 733, 749, 769, 791, 847, 869, 923, 943, 949, 997, 1067, 1103, 1169, 1319, 1327, 1361, 1439, 1451, 1481, 1489, 1493, 1517, 1543, 1549, 1579, 1591, 1643, 1681

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Mathematica

Select[Range[2000], PrimeQ[9876543210*10^IntegerLength[#]+#]&] (* Harvey P. Dale, Jun 22 2024 *)

Prog

(Magma) [ n: n in [1..1750] | IsPrime(Seqint(Intseq(n) cat [0, 1, 2, 3, 4, 5, 6, 7, 8, 9])) ]; // Vincenzo Librandi, Feb 02 2011

Crossrefs

Cf. A104800, A104913.

Sequence in context: A077782 A059414 A110054 * A104913 A225303 A344466

Adjacent sequences: A104909 A104910 A104911 * A104913 A104914 A104915

Keyword

nonn,base

Author

Zak Seidov, Mar 29 2005

Status

approved