A103188 Numbers k such that k711 is prime.

2, 5, 10, 13, 26, 28, 38, 43, 44, 47, 49, 52, 55, 56, 58, 68, 71, 77, 85, 86, 91, 97, 98, 104, 110, 121, 125, 127, 131, 133, 136, 142, 143, 148, 149, 160, 167, 170, 176, 181, 182, 184, 185, 187, 188, 190, 197, 211, 218, 223, 224, 229, 232, 239, 241, 244, 245, 247, 257, 265

Offset

1,1

Links

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

Example

If k=2, then k711 = 2711 (prime).
If k=43, then k711 = 43711 (prime).
If k=58, then k711 = 58711 (prime).

Mathematica

Select[Range[300], PrimeQ[1000#+711]&] (* Harvey P. Dale, Jul 21 2016 *)

Prog

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

Crossrefs

Cf. A103118.

Sequence in context: A018571 A064233 A051952 * A281229 A185647 A064392

Adjacent sequences: A103185 A103186 A103187 * A103189 A103190 A103191

Keyword

base,nonn

Author

Parthasarathy Nambi, Mar 18 2005

Status

approved