According to[1], Rook TX bought 99.3% of all possible number combinations. I couldn't find a site that says why the last 0.7% was missed. Maybe they meant to buy all the tickets, but due to logistical errors or whatever, they discovered they missed a few?

[1] https://www.statesman.com/story/news/politics/state/2025/02/...

Paywalled, but looks like archive.is has it: https://archive.is/256Hz