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A103590
Numbers k such that the string k23571113 represents a prime number.
2
12, 24, 30, 48, 59, 62, 68, 78, 84, 89, 99, 101, 111, 114, 131, 141, 146, 153, 159, 162, 173, 185, 191, 194, 198, 206, 209, 210, 231, 233, 240, 243, 245, 269, 282, 296, 300, 311, 353, 357, 363, 365, 366, 374, 378, 381, 383, 386, 390, 393, 399, 450, 458, 462
OFFSET
1,1
LINKS
EXAMPLE
If k=12, then k23571113 = 1223571113 (prime).
If k=59, then k23571113 = 5923571113 (prime).
If k=99, then k23571113 = 9923571113 (prime).
MATHEMATICA
With[{c={2, 3, 5, 7, 1, 1, 1, 3}}, Select[Range[500], PrimeQ[FromDigits[Join[ IntegerDigits[ #], c]]]&]] (* Harvey P. Dale, Apr 03 2013 *)
PROG
(Magma) [ n: n in [1..700] | IsPrime(Seqint([3, 1, 1, 1, 7, 5, 3, 2] cat Intseq(n))) ]; // Vincenzo Librandi, Feb 03 2011
CROSSREFS
Sequence in context: A328587 A328632 A261435 * A081699 A120570 A164014
KEYWORD
base,nonn
AUTHOR
Parthasarathy Nambi, Mar 23 2005
EXTENSIONS
More terms from Jon E. Schoenfield, May 16 2010
STATUS
approved