He would have had over 100 in the TDF alone assuming he was leading 15 stages on average for just his 7 TDF wins. Count all the other races and the number of times in the off season and that number can add up very very fast. Not to mention that the USADA could easily refute the number to take away the PR.
Best estimates put the number of times Armstrong has been tested in the mid-200’s. That’s a far cry from the 500-600 number that people use to try to prop up Armstrong’s crumbling reutation.