Barker Era ($10,000 slot): The most anyone has ever won in Plinko in the Barker Era with the $10,000 slot is Kelly, who won $23,000 on September 17, 2001 (#1861K, aired out-of-order on September 24), with the $10,000 slot being hit twice.
The Mathematics of the Board\n\n At each level, the penny will be "knocked" either to the left or to the right, each with a 50/50 probability. p(left)^n1 p(right)^n2. But there will be many ways of taking n1 lefts and n2 rights over N levels. If all N choices are left, for instance, there is only one way.