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

Author

Parthasarathy Nambi, Mar 18 2005

Keywords

• base
• nonn

Examples

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

Links

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

Crossrefs

Cf. A103118.

Programs

Magma

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

Mathematica

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