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A102727
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Numbers n such that n1111111 is prime.
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0
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6, 7, 10, 13, 25, 36, 43, 54, 73, 75, 96, 99, 103, 105, 108, 112, 115, 150, 157, 171, 189, 208, 223, 228, 237, 262, 264, 292, 300, 312, 328, 340, 349, 351, 361, 372, 379, 388, 391, 409, 421, 424, 435, 444, 459, 465, 466, 481, 484, 501, 504, 508, 510, 535, 552, 565, 579, 580, 586, 610, 612, 619
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| If n=6, then n1111111 = 61111111 (prime).
If n=54, then n1111111 = 541111111 (prime).
If n=108, then n1111111 = 1081111111 (prime).
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PROG
| (MAGMA) [ n: n in [1..700] | IsPrime(Seqint([1, 1, 1, 1, 1, 1, 1] cat Intseq(n))) ]; [From Vincenzo Librandi, Feb 04 2011]
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CROSSREFS
| Sequence in context: A135121 A083133 A101972 * A114949 A081359 A015825
Adjacent sequences: A102724 A102725 A102726 * A102728 A102729 A102730
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KEYWORD
| base,nonn
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AUTHOR
| Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Feb 25 2005
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