The honest odds. The key sits somewhere in a range of 2139
numbers. Because its public key has been visible on chain since 2017 we can use
Pollard's Kangaroo instead of brute force, which brings the work down to roughly
270 jumps — a fantastic saving, and still an enormous number.
A thousand browsers hunting for a year come out around one in a million.
Odds improve with the square of the time spent, so patience compounds faster than you
would expect — but nobody should plan a retirement around this. Spend only electricity
you are happy to spend. The fun is in watching the swarm move.
Worth knowing: puzzles 141 and up have no public key exposed, which puts them at
2140 work and out of reach of any hardware that could ever exist. 140 is the
one where the door is at least unlocked.