The Trump campaign needs to record all of the ballot numbers for ALL ballots with Biden-only vote and no down-ballot votes for other candidates. My guess is that many of them will be in a sequential batch. That's proof of fraud, because in non-fraud occurrence of those they would be scattered throughout the numbering with random numbers.

I repeat, a sequential numbering of ballots with Biden-only votes means someone had a stack of ballots and was just checking Biden on them. Otherwise they would be random ballot numbers.