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 A108980 Numbers k such that the string k9111 is prime. 0
 7, 10, 14, 16, 17, 28, 32, 35, 38, 53, 56, 58, 61, 67, 73, 77, 82, 91, 94, 103, 112, 121, 124, 127, 128, 133, 137, 143, 145, 164, 169, 176, 185, 190, 194, 196, 199, 214, 221, 229, 235, 248, 254, 257, 259, 263, 266, 269, 271, 275, 287, 292, 301, 310, 311, 313 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Also numbers k such that 10000*k + 9111 is prime. - Stefan Steinerberger, Feb 26 2006 LINKS Table of n, a(n) for n=1..56. EXAMPLE If k=7 then k9111 = 79111 (prime). If k=94 then k9111 = 949111 (prime). MATHEMATICA Select[Range[350], PrimeQ[10000*# + 9111] &] (* Stefan Steinerberger, Feb 26 2006 *) CROSSREFS Sequence in context: A306469 A059752 A080205 * A005526 A192292 A030123 Adjacent sequences: A108977 A108978 A108979 * A108981 A108982 A108983 KEYWORD nonn,base AUTHOR Parthasarathy Nambi, Jul 27 2005 EXTENSIONS More terms from Stefan Steinerberger, Feb 26 2006 STATUS approved

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Last modified May 25 10:42 EDT 2024. Contains 372788 sequences. (Running on oeis4.)