lotterypuzzle atlas

Bitcoin Puzzle record

Bitcoin Puzzle #126

open · address only

12.6 BTC nominal2125 candidate keys

Where it sits on the line

Puzzles #114–#138: search work One column per puzzle; height is the base-2 logarithm of the search steps. Puzzle #126 is highlighted. The line sits at 2^69. #114 · 2^113 #115 · 2^58 #116 · 2^115 #117 · 2^116 #118 · 2^117 #119 · 2^118 #120 · 2^60.5 #121 · 2^120 #122 · 2^121 #123 · 2^122 #124 · 2^123 #125 · 2^63 #126 · 2^125 #127 · 2^126 #128 · 2^127 #129 · 2^128 #130 · 2^65.5 #131 · 2^130 #132 · 2^131 #133 · 2^132 #134 · 2^133 #135 · 2^68 #136 · 2^135 #137 · 2^136 #138 · 2^137
  • found
  • open · address only
  • open · public key on chain
  • the line · 269

This puzzle needs about 2125 search steps — above the line (269).

No puzzle above the line has been found yet.

Model: range scan. Every candidate key in the interval is hashed and compared with the address.

How the work is estimated

Record

P2PKH address
1AWCLZAjKbV1P7AHvaPNCKiB7ZWVDMxFiz
mempool.space Blockstream
HASH160
683ea8a1ef06eada90556017d44323b5c04e00f1
Search class
address-only
No public key on record: the only route is to hash candidate keys and compare them with the address (HASH160).
Candidate interval
2125 → 2126 − 1
start0x20000000000000000000000000000000
end0x3fffffffffffffffffffffffffffffff
Interval size42535295865117307932921825928971026432 scalars. Exact BigInt bounds, not a floating estimate.

Snapshot 2 Oct 2026. The reward is the catalog's nominal allocation (N × 0.1 convention from 2023-04-16; earlier spends predate it), not a live balance. A key that matches the address proves the math, not that the coins are still there: check an explorer. Missing fields are omitted, not invented.

Method

Without a catalogued public key the work is sequential HASH160 comparison across the interval, so it grows with the interval size.