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A102813
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Numbers n such that n11111111 is prime.
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0
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17, 35, 36, 39, 42, 48, 50, 74, 80, 92, 95, 105, 120, 122, 128, 135, 141, 170, 171, 203, 206, 218, 239, 249, 255, 263, 276, 284, 287, 300, 311, 332, 333, 338, 351, 386, 398, 401, 414, 417, 419, 449, 450, 468, 483, 486, 498, 507, 512, 515, 524, 531, 534, 569, 575, 576, 581, 615
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| If n=17, then n11111111 = 1711111111 (prime).
If n=74, then n11111111 = 7411111111 (prime).
If n=128, then n11111111 = 12811111111 (prime).
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PROG
| (MAGMA) [ n: n in [1..700] | IsPrime(Seqint([1, 1, 1, 1, 1, 1, 1, 1] cat Intseq(n))) ]; // From Vincenzo Librandi, Feb 03 2011
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CROSSREFS
| Sequence in context: A098365 A033899 A110287 * A041568 A042305 A041566
Adjacent sequences: A102810 A102811 A102812 * A102814 A102815 A102816
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KEYWORD
| base,nonn
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AUTHOR
| Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Feb 26 2005
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