open Big_int;; let main () = let x = big_int_of_string "4294967296" in let y = 1269760 in let answer = power_big_int_positive_int x y in print_endline (string_of_big_int answer);; (* *$ ocamlc big_math.ml -o big *Error while linking big_math.cmo: Reference to undefined global `Big_int' *)