Its actually some way off beating a human
To quote Guiness:
Billy Mitchell (USA) scored the first “perfect” PAC-MAN game (3,333,360 points) on 3 July 1999, four more players have matched it. The top players now consider it a greater accomplishment to achieve the perfect game in the fastest time: Top 5 “Perfect” pac-man Rankings: Chris Ayra (USA) 3:42:04 16/2/2000 Rick Fothergill (Can) 3:58:42 31/7/1999 Tim Baldarramos (USA) 4:45:15 8/8/2004 Donald Hayes (USA) 5:24:46 21/7/2005 Billy Mitchell (USA) 5:30:00 3/7/1999 GWR Video Gamer's Edition 2008.