anchor.diff:      Seed = case Algo of
   	       exsplus -> %% Printed with orig 'C' code and this seed
   		   rand:seed_s({exsplus, [12345678|12345678]});
  -	       exs64 -> %% Printed with orig 'C' code and this seed
  -		   rand:seed_s({exs64, 12345678});
   	       exs1024 -> %% Printed with orig 'C' code and this seed
   		   rand:seed_s({exs1024, {lists:duplicate(16, 12345678), []}});
  -	       _ ->
  -		   rand:seed(Algo, {100, 200, 300})
  +	       _ -> % unimplemented
  +		   not_implemented
   	   end,
  -    gen_jump(?LOOP_JUMP, Seed, []).
  +    case Seed of
  +        not_implemented -> [not_implemented];
  +        S -> gen_jump(?LOOP_JUMP, S, [])
  +    end.
   
   gen_jump(N, State0 = {#{max:=Max}, _}, Acc) when N > 0 ->
       {_, State1} = rand:uniform_s(Max, State0),
  
positive.code:      65235580992800860, 230664399047956956, 64575592354687978, 40519393736078511,
       108341851194332747, 115426411532008961, 120656817002338193, 234537867870809797,
       12504080415362731, 45083100453836317, 270968267812126657, 93505647407734103,
       252852934678537969, 258758309277167202, 74250882143432077, 141629095984552833].
  
negative.code: 
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  
  -define(LOOP_JUMP, (?LOOP div 1000)).
  
  %% Check if exs64 algorithm generates the proper jump sequence.
  reference_jump(Config) when is_list(Config) ->
  