相关疑难解决方法(0)

我是Haskell的新手,并尝试从http://projecteuler.net/解决3个问题.

The prime factors of 13195 are 5, 7, 13 and 29.

What is the largest prime factor of the number 600851475143 ?

我的解决方案

import Data.List

getD :: Int -> Int
getD x = 
  -- find deviders
  let deriveList = filter (\y -> (x `mod` y) == 0) [1 .. x]
      filteredList = filter isSimpleNumber deriveList
  in maximum filteredList

-- Check is nmber simple
isSimpleNumber :: Int -> Bool
isSimpleNumber x = let deriveList = map (\y -> …