A102372 Numbers k such that k11111 is prime.

3, 5, 6, 9, 20, 24, 26, 39, 42, 48, 60, 65, 68, 83, 84, 93, 95, 108, 119, 126, 132, 146, 167, 179, 182, 189, 203, 206, 213, 224, 227, 230, 233, 234, 249, 258, 269, 270, 272, 291, 296, 305, 315, 324, 329, 336, 341, 345, 347, 348, 363, 368, 377, 384, 387, 392, 402, 422, 423, 438, 440, 450, 455, 458

Offset

1,1

Links

Table of n, a(n) for n=1..64.

Example

If k=3, then k11111 = 311111 (prime).
If k=60, then k11111 = 6011111 (prime).
If k=126, then k11111 = 12611111 (prime).

Mathematica

Select[Range[500], PrimeQ[100000#+11111]&] (* Harvey P. Dale, Jan 15 2013 *)

Prog

(Magma) [ n: n in [1..700] | IsPrime(Seqint([1, 1, 1, 1, 1] cat Intseq(n))) ]; // Vincenzo Librandi, Feb 04 2011

Crossrefs

Cf. A101471, A102248, A102249.

Sequence in context: A101139 A309140 A102606 * A095829 A054871 A248644

Adjacent sequences: A102369 A102370 A102371 * A102373 A102374 A102375

Keyword

base,nonn

Author

Parthasarathy Nambi, Feb 22 2005

Status

approved