Unsolved
Bitcoin puzzle #108
Bitcoin puzzle #108 is unsolved. It holds 10.80 BTC, and its private key is an unknown number between 2107 and 2108−1 — a keyspace of 1.62 × 1032 possible keys. You can search that range with the solver below; it runs in your browser and never sends anything to a server.
Solver — #108
IdleJump to a random point in the range, sweep a block of keys, jump again. Best when many people search the same puzzle.
Each thread is one Web Worker on one core. Leaving a core free keeps the page responsive.
Walk the range in order from your start key up to the end of the range, splitting that region evenly across threads. Keys below the start key are not searched. Best when you are coordinating a systematic sweep.
Range covered: 0%
· Current key: 800000000000000000000000000
Puzzle #108 at a glance
- Reward
- 10.8 BTC
- Address
- 1HB1iKUqeffnVsvQsbpC6dNi1XKbyNuqao
- HASH160
- b166c44f12c7fc565f37ff6288ee64e0f0ec9a0b
- Range start
- 800000000000000000000000000
- Range end
- fffffffffffffffffffffffffff
- Bit length
- 108-bit
- Keys in range
- 1.62 × 1032 (162259276829213363391578010288128)
- Transactions
- 3
The arithmetic
The range for puzzle #108 contains 1.62 × 1032 private keys. A modern eight-core laptop running this solver checks on the order of four million keys per second, so an exhaustive sweep would take about 1.28 × 1018 years. Searching randomly instead of in order does not change that expectation — it only changes which unlucky order you fail in.
Puzzle #108 — common questions
How many private keys does Bitcoin puzzle #108 contain?
Puzzle #108 spans the range 2^107 to 2^108−1, which is exactly 1.62 × 10^32 private keys — twice as many as puzzle #107.
How long would it take to solve Bitcoin puzzle #108?
An eight-core machine running this browser solver at four million keys per second would need about 1.28 × 10^18 years to sweep the whole range. A pooled GPU cluster reaching one trillion keys per second would need about 5.14e+3 billion years.
How much is Bitcoin puzzle #108 worth?
The address holds 10.8 BTC, roughly $845,154 at a reference price of $78,255 per BTC.
Is Bitcoin puzzle #108 solved?
No. #108 is one of the 78 unsolved puzzles. Its public key has never been exposed, so square-root methods like Pollard's Kangaroo do not apply — brute force over the range is the only option.
What is the key range for puzzle #108?
From 800000000000000000000000000 to fffffffffffffffffffffffffff in hexadecimal. The address is 1HB1iKUqeffnVsvQsbpC6dNi1XKbyNuqao and its HASH160 is b166c44f12c7fc565f37ff6288ee64e0f0ec9a0b.