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A103590
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Numbers k such that the string k23571113 represents a prime number.
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2
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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
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OFFSET
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1,1
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LINKS
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Harvey P. Dale, Table of n, a(n) for n = 1..1000
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EXAMPLE
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If k=12, then k23571113 = 1223571113 (prime).
If k=59, then k23571113 = 5923571113 (prime).
If k=99, then k23571113 = 9923571113 (prime).
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MATHEMATICA
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With[{c={2, 3, 5, 7, 1, 1, 1, 3}}, Select[Range[500], PrimeQ[FromDigits[Join[ IntegerDigits[ #], c]]]&]] (* Harvey P. Dale, Apr 03 2013 *)
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PROG
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(MAGMA) [ n: n in [1..700] | IsPrime(Seqint([3, 1, 1, 1, 7, 5, 3, 2] cat Intseq(n))) ]; // Vincenzo Librandi, Feb 03 2011
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CROSSREFS
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Sequence in context: A328587 A328632 A261435 * A081699 A120570 A164014
Adjacent sequences: A103587 A103588 A103589 * A103591 A103592 A103593
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KEYWORD
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base,nonn
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AUTHOR
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Parthasarathy Nambi, Mar 23 2005
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EXTENSIONS
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More terms from Jon E. Schoenfield, May 16 2010
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STATUS
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approved
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