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Search: id:A119017
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| A119017 |
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Primes from binary expansion of Pi, another version. Starting with the first bit of the binary expansion, A004601 = 1,1,0,0,1,0,0,1,0,0,0,0,1,1,1,1,1,1,0,1,1,0,1,... we move rightward until we encounter another 1. Since 11 (= 3 in decimal) is prime, we move to the next 1 and repeat the process. |
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+0
3
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| 3, 73, 4639, 67, 3, 3, 3, 3, 3, 5, 3, 5, 5, 5, 17, 17, 1069, 5, 3, 5, 17, 3, 9099300883537, 17, 3, 5, 19, 3, 17, 19, 3, 17, 3, 19, 3, 17, 5, 17, 5, 3, 3, 257, 3, 5, 3, 3, 131, 3, 3, 19, 3, 5, 17, 37, 5, 1153, 1033, 73, 19, 3, 3, 16657, 17, 17, 5, 19, 3, 19, 3, 3, 3, 3, 19, 3, 17, 3, 3
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Records: 3, 73, 4649, 9099300883537, 37848784972821936516494858855515680431107854546647118951099098009925403829863969526043052181881, ..., . - Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 24 2006
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EXAMPLE
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11 = 3
1001001 = 73
1001000011111 = 4639
1000011 = 67
11 = 3
11 = 3
11 = 3
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MATHEMATICA
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ps = First@RealDigits[Pi, 2, 10^3]; lst = {}; Do[k = 1; While[fd = FromDigits[ Take[ps, k], 2]; EvenQ@fd || ! PrimeQ@fd, k++ ]; AppendTo[lst, fd]; j = 1; While[ ps[[j]] != 1, j++ ]; ps = Drop[ps, j], {n, 77}]; lst - Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 24 2006
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CROSSREFS
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Cf. A004601, A068425, A117721, A065987.
Sequence in context: A093165 A012810 A020517 this_sequence A002667 A145675 A162601
Adjacent sequences: A119014 A119015 A119016 this_sequence A119018 A119019 A119020
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KEYWORD
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nonn,base
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AUTHOR
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Russell Walsmith (ixitol(AT)gmail.com), Jul 23 2006
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 24 2006
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