The final report by the Republican investigators concluded that President Biden actually won 99 more votes than were reported, and that former President Donald J. Trump tallied 261 fewer votes.

But given the large undercount found in just a sliver of the 2.1 million ballots, it would effectively be impossible for the Republican investigators to arrive at such precise numbers, the experts said…

Investigators went through more than 1,600 ballot-filled boxes this summer to conduct their hand recount of the election in Maricopa County, the most populous county in the state. Both they and the Republican-controlled State Senate, which ordered the election inquiry, have refused to disclose the details of that hand count.

But a worksheet containing the results of the hand count of 40 of those boxes was included in a final report on the election inquiry released a week ago by Cyber Ninjas.

The three election experts said the hand count could have missed thousands or even hundreds of thousands of ballots if all 1,600 boxes of ballots were similarly undercounted. Their findings were earlier reported in The Arizona Republic.