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Search: id:A109166
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| A109166 |
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Numbers n such that the concatenation of consecutive increasing numbers beginning with prime(n) and ending with prime(n+1) is prime; or n such that A111875(n) is prime. |
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+0
1
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| 1, 37, 58, 119, 130, 195, 292, 419, 453, 464, 561, 617, 618, 652, 679, 720, 762, 787, 827, 830, 945, 1034, 1090, 1139, 1191, 1200, 1344, 1383, 1386, 1451, 1496, 1519, 1774, 1783, 1820, 1822, 1911, 1966, 1973, 2018, 2128, 2219, 2247, 2378, 2566, 2644
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Honaker's prime curiosity corresponds to a(2)=37. Concatenating all the increasing numbers from prime(1473480)=23428439 to prime(1473481)=23428523 produces a 680-digit prime (certified).
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LINKS
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G. L. Honaker, Jr., Prime Curios
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EXAMPLE
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a(3)=58 because prime(58)=271 and prime(59)=277 and 271272273274275276277
is prime.
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CROSSREFS
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Sequence in context: A045223 A134222 A127023 this_sequence A090798 A000928 A073276
Adjacent sequences: A109163 A109164 A109165 this_sequence A109167 A109168 A109169
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KEYWORD
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easy,nonn,base
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Aug 18 2005
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