"OK people, this is getting serious! Search your couch cushions, look in your glove box, check all your pants pockets," the California Lottery prodded in a news release.
The lucky ticket matched five of the six numbers in the drawing: 31-35-41-9-57, missing only the Powerball number of 26. It was sold at Whitley Heights Market at 1900 North Highland Avenue.
The ticket expires at 5 p.m. on Nov. 18.
If the money goes unclaimed, lottery officials said, the prize money will go to California schools.