Tran's ticket matched the first five numbers: 8,14,17, 20, 39 during the Dec., 17, 2013, Mega Millions drawing.
The winning ticket was purchased at Tai Nam Food Market, 4925 North Broadway in Chicago's Uptown neighborhood.
The Mega Millions jackpot climbed to a staggering $648 million for the December 17 drawing.
Starting last October, the Mega Millions minimum jackpot increased from $12 million to $15 million, and will grow by at least $5 million after each drawing in which the jackpot is not won.
