TALLAHASSEE, FLA. — An 84-year-old Florida woman who bought her Powerball ticket after another customer let her get ahead in line came forward Wednesday to claim the $590 million jackpot, becoming the largest sole lottery winner in U.S. history.

Gloria C. Mackenzie, of Zephyrhills, where the winning ticket was sold May 18, took a single lump sum payment of just over $370 million, Florida Lottery officials said. After paying 25 percent for federal income taxes, Mackenzie is taking home about $270 million.

She did not speak to a crowd of reporters outside lottery headquarters, leaving quickly with her son and family friends. She was accompanied by two unidentified attorneys.

In a statement read by lottery officials, Mackenzie said she purchased the ticket after another buyer “was kind enough to let me go ahead in line to purchase the winning ticket.”