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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Pernicious-numbers/Miranda/pernicious-numbers.miranda Normal file
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main :: [sys_message]
main = [Stdout (lay (map show [first25, large]))]
first25 :: [num]
first25 = take 25 (filter pernicious [1..])
large :: [num]
large = filter pernicious [888888877..888888888]
pernicious :: num->bool
pernicious = prime . popcount
popcount :: num->num
popcount 0 = 0
popcount n = n mod 2 + popcount (n div 2)
prime :: num->bool
prime n = n >= 2 & and [n mod d ~= 0 | d<-[2..sqrt n]]