I have been thinking about a useless TOTP app that works the other way around. Instead of giving you the current code, it gives you the timestamps when the code is e.g. 000000, 123456 or 777777.
With a window of 30 seconds and 1e6 possibilities, the expected time it takes to get to a particular number is 347 days. Should be easy to brute force.
With a window of 30 seconds and 1e6 possibilities, the expected time it takes to get to a particular number is 347 days. Should be easy to brute force.