4 lines
152 B
Haskell
4 lines
152 B
Haskell
-- 2 - all even primes lower 4 million
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problem_2 :: Int
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problem_2 = sum [x | x <- (takeWhile (<= 4000000) ((fix (\f x y -> x:f y (x+y))) 1 1)), even x]
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