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A102372
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Numbers k such that k11111 is prime.
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0
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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
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OFFSET
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1,1
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LINKS
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EXAMPLE
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If k=3, then k11111 = 311111 (prime).
If k=60, then k11111 = 6011111 (prime).
If k=126, then k11111 = 12611111 (prime).
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MATHEMATICA
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Select[Range[500], PrimeQ[100000#+11111]&] (* Harvey P. Dale, Jan 15 2013 *)
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PROG
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(Magma) [ n: n in [1..700] | IsPrime(Seqint([1, 1, 1, 1, 1] cat Intseq(n))) ]; // Vincenzo Librandi, Feb 04 2011
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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STATUS
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approved
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