Two people are waking up to find themselves millions of dollars richer.  The holders of a ticket sold in Idaho and another in Washington state will be sharing Mega Millions' $355 million jackpot from Tuesday night's drawing, lottery officials said Wednesday.  The prize is the fourth-largest in U.S. history and the second-largest in Mega Millions history. The lottery's prize of $390 million in March 2007 remains the nation's richest on record.  The two winners from Tuesday will each get $177.5 million. Besides the jackpot, prizes range from $2 to $250,000.