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Filename : default.txt

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module fsieve

import StdClass; // RWS
import StdInt, StdReal

NrOfPrimes :== 3000

primes :: [Int]
primes = pr where pr = [5 : sieve 7 4 pr]

sieve :: Int !Int [Int] -> [Int]
sieve g i prs
| isPrime prs g (toInt (sqrt (toReal g))) = [g : sieve` g i prs]
| otherwise                               = sieve (g + i) (6 - i) prs

sieve` :: Int Int [Int] -> [Int]
sieve` g i prs = sieve (g + i) (6 - i) prs

isPrime :: [Int] !Int Int -> Bool
isPrime [f:r] pr bd
| f>bd        =  True
| pr rem f==0 =  False
| otherwise   =  isPrime r pr bd

select :: [x] Int -> x
select [f:r] 1 = f
select [f:r] n = select r (n - 1)

Start :: Int
Start = select [2, 3 : primes] NrOfPrimes