tracks/ocaml/exercises/prime-factors/example.ml in trackler-2.2.1.110 vs tracks/ocaml/exercises/prime-factors/example.ml in trackler-2.2.1.111

@@ -1,9 +1,9 @@
-open Core
+open Base
 
 let square_root_trunc n =
     (* Square root is not defined on int64 *)
-    Int64.to_float n |> sqrt |> Int64.of_float
+    Int64.to_float n |> Float.sqrt |> Int64.of_float
 
 let rec factors_of' = function
     | 1L -> []
     | n  -> factors_of_loop n
 and factors_of_loop n =