A103531 Numbers k such that k235711 is prime.

1, 3, 9, 12, 15, 27, 34, 37, 43, 45, 46, 55, 61, 66, 72, 75, 82, 93, 94, 106, 117, 130, 132, 138, 139, 142, 144, 145, 157, 163, 165, 169, 181, 198, 199, 205, 214, 222, 237, 256, 258, 274, 276, 289, 297, 300, 309, 310, 319, 324, 331, 333, 337, 339, 355, 361, 367, 384, 387, 390, 397

Offset

1,2

Links

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

Example

k=1 is in the sequence because  k235711 = 1235711 is prime.
k=37 is in the sequence because k235711 = 37235711 is prime.
k=72 is in the sequence because k235711 = 72235711 is prime.

Mathematica

Select[Range[400], PrimeQ[10^6 #+235711]&] (* Harvey P. Dale, Jan 17 2023 *)

Prog

(Magma) [ n: n in [1..700] | IsPrime(Seqint([1, 1, 7, 5, 3, 2] cat Intseq(n))) ]; // Vincenzo Librandi, Feb 03 2011

Crossrefs

Sequence in context: A194412 A136290 A244147 * A333441 A108860 A006499

Adjacent sequences: A103528 A103529 A103530 * A103532 A103533 A103534

Keyword

base,nonn

Author

Parthasarathy Nambi, Mar 21 2005

Status

approved