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A110583
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Numbers n such that the string 888n is prime.
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0
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7, 11, 13, 17, 19, 43, 53, 61, 67, 73, 83, 97, 103, 109, 133, 143, 157, 161, 163, 179, 203, 211, 247, 257, 263, 271, 287, 313, 319, 323, 359, 361, 373, 389, 397, 409, 413, 427, 431, 443, 451, 457, 469, 479, 493, 499, 533, 541, 557, 623, 631, 637, 653, 659, 661
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| If n=73 then 888n = 88873 (prime).
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MATHEMATICA
| Select[Range[1000], PrimeQ[FromDigits[Join[{8, 8, 8}, IntegerDigits[#]]]]&] (* From Harvey P. Dale, Mar 28 2011 *)
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CROSSREFS
| Sequence in context: A141636 A176834 A098414 * A103486 A086843 A049481
Adjacent sequences: A110580 A110581 A110582 * A110584 A110585 A110586
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KEYWORD
| nonn,base
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AUTHOR
| Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Sep 12 2005
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EXTENSIONS
| More terms from Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Mar 27 2010
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