Unsolved
Bitcoin puzzle #112
Bitcoin puzzle #112 is unsolved. It holds 11.20 BTC, and its private key is an unknown number between 2111 and 2112−1 — a keyspace of 2.59 × 1033 possible keys. You can search that range with the solver below; it runs in your browser and never sends anything to a server.
Solver — #112
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: 8000000000000000000000000000
Puzzle #112 at a glance
- Reward
- 11.2 BTC
- Address
- 18A7NA9FTsnJxWgkoFfPAFbQzuQxpRtCos
- HASH160
- 4e81efec43c5195aeca0e3877664330418b8e48e
- Range start
- 8000000000000000000000000000
- Range end
- ffffffffffffffffffffffffffff
- Bit length
- 112-bit
- Keys in range
- 2.59 × 1033 (2596148429267413814265248164610048)
- Transactions
- 3
The arithmetic
The range for puzzle #112 contains 2.59 × 1033 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 2.05 × 1019 years. Searching randomly instead of in order does not change that expectation — it only changes which unlucky order you fail in.
Puzzle #112 — common questions
How many private keys does Bitcoin puzzle #112 contain?
Puzzle #112 spans the range 2^111 to 2^112−1, which is exactly 2.59 × 10^33 private keys — twice as many as puzzle #111.
How long would it take to solve Bitcoin puzzle #112?
An eight-core machine running this browser solver at four million keys per second would need about 2.05 × 10^19 years to sweep the whole range. A pooled GPU cluster reaching one trillion keys per second would need about 8.23e+4 billion years.
How much is Bitcoin puzzle #112 worth?
The address holds 11.2 BTC, roughly $876,456 at a reference price of $78,255 per BTC.
Is Bitcoin puzzle #112 solved?
No. #112 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 #112?
From 8000000000000000000000000000 to ffffffffffffffffffffffffffff in hexadecimal. The address is 18A7NA9FTsnJxWgkoFfPAFbQzuQxpRtCos and its HASH160 is 4e81efec43c5195aeca0e3877664330418b8e48e.