Bigger numbers, try parallel computation

src/3n+1/Main.hs

@@ -3,11 +3,28 @@ The Simplest Math Problem No One Can Solve - Collatz Conjecture
 https://youtu.be/094y1Z2wpJg
 -}
 
-import           Control.Monad ()
+import           Control.Parallel.Strategies (parMap, rdeepseq, rpar)
-import           Debug.Trace   (trace)
+import           Data.Set                    (fromList)
+import           Debug.Trace                 (trace)
 
 main :: IO ()
-main = print $ take 100 $ map f [2^1000..]
+main = do
+  let results =
+            parMap rdeepseq f [10^100_000..10^100_000+100] :: [Integer]
+  print (fromList results)
+-- main = print $ fromList $ dxs
+-- main = print $ fromList $ take 300 $ map f [2^100_000..]
+  -- fromList [100001,717859]
+
+-- main = print $ fromList $ take 3 $ map f [2^310997..]
+-- main = print $ f $ 2^310997 + 2
+
+lst :: [Integer]
+lst = take 300 [2^100_000..]
+
+dxs :: [Integer]
+dxs = parMap rpar f lst
+
 
 f :: Integer -> Integer
 f n = s 1 n