If you want it fast, don't use a sieve method at all (or a wheel method) - use trial division:
primes = 2 : [p | p <- [3,5..], trialDivision primes p] trialDivision (p:ps) n | r == 0 = False | q < p = True | otherwise = trialDivision ps n where (q,r) = n `quotRem` p trialDivision [] _ = True _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe