Here's why:
* PCH doesn't track winners by number: Publishers Clearing House doesn't publicly list winners in sequential order. They may announce major prize winners, but they don't keep a running tally of "winner number" for every prize.
* Privacy of winners: PCH respects the privacy of their winners and doesn't usually release their names or details publicly unless they consent.
If you're looking for specific information about a PCH winner, you could try searching for news articles from 1993 that mentioned major prize winners. However, it's unlikely you'll find a specific "10,000,000th" winner.