10 lines
264 B
Haskell
10 lines
264 B
Haskell
|
module Main where
|
||
|
|
||
|
primes = 2 : [i | i <- [3..],
|
||
|
and [rem i p > 0 | p <- takeWhile (\p -> p^2 <= i) primes]]
|
||
|
|
||
|
primeFactors n = filter (\a -> n `mod` a == 0) (takeWhile (\m -> m * m < n) primes)
|
||
|
|
||
|
main = do
|
||
|
print (last (primeFactors 600851475143))
|