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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

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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