7-Eleven clerk Matt Murphy hands Mega Millions lottery tickets to a customer at a store on the 300 block of N. LaSalle St. Friday, March 30, 2012, in Chicago. As of about 4:30 p.m., Murphy said he estimates to have sold about $15,000 in Mega Millions tickets since beginning his shift at 10 a.m. | John J. Kim~Sun-Times

An oversized television screen on Dearborn St. displays a news anchor talking about the Mega Millions lottery Friday, March 30, 2012, in Chicago. | John J. Kim~Sun-Times

7-Eleven clerk Matt Murphy hands Mega Millions lottery tickets to a customer at a store on the 300 block of N. LaSalle St. Friday, March 30, 2012, in Chicago. As of about 4:30 p.m., Murphy said he estimates to have sold about $15,000 in Mega Millions tickets since beginning his shift at 10 a.m. | John J. Kim~Sun-Times

A customer looks through his $100 worth of Mega Millions lottery tickets purchased at a 7-Eleven store on the 300 block of N. LaSalle St. Friday, March 30, 2012, in Chicago. As of about 4:30 p.m., store clerk Matt Murphy said he estimates to have sold about $15,000 in Mega Millions tickets since beginning his shift at 10 a.m. | John J. Kim~Sun-Times

7-Eleven clerk Matt Murphy hands Mega Millions lottery tickets to a customer at a store on the 300 block of N. LaSalle St. Friday, March 30, 2012, in Chicago. As of about 4:30 p.m., Murphy said he estimates to have sold about $15,000 in Mega Millions tickets since beginning his shift at 10 a.m. | John J. Kim~Sun-Times

People wait in line to buy Mega Millions lottery tickets at a convenience store in the Merchandise Mart Friday, March 30, 2012, in Chicago. | John J. Kim~Sun-Times

A customer smiles after receiving a free Mega Millions Lottery ticket from the Hoosier Lottery's Mega Millions mascot at a store in Zionsville, Ind., Friday, March 30, 2012. The Mega Millions Lottery jackpot has reached a record $540 million.(AP Photo/Michael Conroy)

Mega Millions Lottery tickets that were given away to the first 540 people are displayed by the Hoosier Lottery's Mega Millions mascot at a store in Zionsville, Ind., Friday, March 30, 2012. The Mega Millions Lottery jackpot has reached a record $540 million.(AP Photo/Michael Conroy)

People stand in line as they prepare to buy lottery tickets for the Mega Million Jackpot, which is estimated at $540 million Thursday March 29, 2012 at the Town and Country in McAllen, Texas. (AP Photo/The Monitor, Gabe Hernandez) MAGS OUT; TV OUT

Thousands of people wait in line to buy tickets for the Mega Millions Lottery jackpot at the Primm Valley Casino Resorts Lotto store in California near Primm, Nev. Thursday, March 29, 2012. The Mega Millions Lottery jackpot has reached a record $540 million. (AP Photo/Las Vegas Review-Journal, John Locher) LAS VEGAS SUN OUT; MAGS OUT

A customer collects lottery tickets that were purchased at a liquor store in Mountain View, Calif., Thursday, March 29, 2012, in hopes to win the Mega Millions lottery. The Mega Millions jackpot is now the largest in U.S. lottery history. (AP Photo/Paul Sakuma)

Mega Millions rush: 7-Eleven store employee Tayyab Bashir takes in play slips as Chicagoans play Mega Millions Friday evening. I Scott Stewart~Sun-Times