LANSING, Mich. (AP) — The Michigan Lottery says a $1 million Powerball winner has a month to claim the prize before schools get an unexpected gift.

Someone matched five numbers on Sept. 25, 2017. The ticket was purchased at Ionia Marathon in Ionia, between Lansing and Grand Rapids.

Winning Powerball tickets are valid for one year from the drawing date. If the prize goes unclaimed, the money goes into Michigan's School Aid Fund.

Lottery spokesman Jeff Holyfield says about $28 million in prize money went unclaimed in the last fiscal year. Winners claimed roughly $2 billion during the same period. Holyfield says the largest unclaimed winning ticket was $34 million, which was drawn in 1997.