Puzzle of finding Bitcoin private keys in given ranges
Description of the puzzle
In 2015, to show the enormity of the private key space (or maybe just for fun), someone created a "puzzle" in which he selected the keys in a certain smaller space and sent increasing amounts to each of those keys. for example:
20 ≤ random key < 21 — 0.001 BTC
21 ≤ random key < 22 — 0.002 BTC
23 ≤ random key < 23 — 0.003 BTC
...
2255 ≤ random key < 2256 — 0.256 BTC
(total 32.896 BTC)
The first 65 and private keys #70, #75, #80, #85, #90, #95, #100, #105, #110, #115, #120 have already been hacked.
Chances of finding a bitcoin private key

List of bitcoin wallets for which private keys have not yet been found
Key search range
Bitcoin wallet addresses
6.7
6.7
3
6.80001
6.80001
4
6.90000547
6.90000547
4
400000000000000000...7fffffffffffffffff (270...271-1)
7.1
7.1
3
800000000000000000...ffffffffffffffffff (271...272-1)
7.2
7.2
3
1000000000000000000...1ffffffffffffffffff (272...273-1)
7.3
7.3
3
2000000000000000000...3ffffffffffffffffff (273...274-1)
7.4
7.4
3
8000000000000000000...fffffffffffffffffff (275...276-1)
7.6
7.6
3
10000000000000000000...1fffffffffffffffffff (276...277-1)
7.7
7.7
3