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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
199093 changed files with 3378972 additions and 0 deletions

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toFrac=: '/r' 0&".@charsub ] NB. read fractions from string
fractran15=: ({~ (= <.) i. 1:)@(toFrac@[ * ]) ^:(<15) NB. return first 15 Fractran results

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taskstr=: '17/91 78/85 19/51 23/38 29/33 77/29 95/23 77/19 1/17 11/13 13/11 15/14 15/2 55/1'
taskstr fractran15 2
2 15 825 725 1925 2275 425 390 330 290 770 910 170 156 132

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fractran=. (((({~ (1 i.~ (= <.)))@:* ::]^:)(`]))(".@:('1234567890r ' {~ '1234567890/ '&i.)@:[`))(`:6)

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'17/91 78/85 19/51 23/38 29/33 77/29 95/23 77/19 1/17 11/13 13/11 15/14 15/2 55/1' (<15) fractran 2
2 15 825 725 1925 2275 425 390 330 290 770 910 170 156 132

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primes=. ('fractan'f.) ((1 }. 2 ^. (#~ *./@:e.&2 0"1@:q:))@:)
'17/91 78/85 19/51 23/38 29/33 77/29 95/23 77/19 1/17 11/13 13/11 15/14 15/2 55/1' (<555555) primes 2
2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71

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primes
((((({~ (1 i.~ (= <.)))@:* ::]^:)(`]))(".@:('1234567890r ' {~ '1234567890/ '&i.)@:[`))(`:6))((1 }. 2 ^. (#~ *./@:e.&2 0"1@:q:))@:)

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_ fractran
".@:('1234567890r ' {~ '1234567890/ '&i.)@:[ ({~ (1 i.~ (= <.)))@:* ::]^:_ ]

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FRACTRAN=. ({~ (1 i.~ (= <.)))@:* ::]^:_

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455r33 11r13 1r11 3r7 11r2 1r3 FRACTRAN 11664
59604644775390625