lotterypuzzle atlas

Bitcoin Puzzle record

Bitcoin Puzzle #67

found · spent

6.7 BTC nominal266 candidate keys

Where it sits on the line

Puzzles #55–#79: search work One column per puzzle; height is the base-2 logarithm of the search steps. Puzzle #67 is highlighted. The line sits at 2^69. #55 · 2^54 #56 · 2^55 #57 · 2^56 #58 · 2^57 #59 · 2^58 #60 · 2^59 #61 · 2^60 #62 · 2^61 #63 · 2^62 #64 · 2^63 #65 · 2^33 #66 · 2^65 #67 · 2^66 #68 · 2^67 #69 · 2^68 #70 · 2^35.5 #71 · 2^70 #72 · 2^71 #73 · 2^72 #74 · 2^73 #75 · 2^38 #76 · 2^75 #77 · 2^76 #78 · 2^77 #79 · 2^78
  • found
  • open · address only
  • open · public key on chain
  • the line · 269

This puzzle needs about 266 search steps — below the line (269).

Every puzzle below the line has been found.

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

How the work is estimated

Record

P2PKH address
1BY8GQbnueYofwSuFAT3USAhGjPrkxDdW9
mempool.space Blockstream
Known public key
0212209f5ec514a1580a2937bd833979d933199fc230e204c6cdc58872b7d46f75
HASH160
739437bb3dd6d1983e66629c5f08c70e52769371
Search class
historical
The output has been spent. Dates and labels are catalog attributions, not audited identities.
Candidate interval
266 → 267 − 1
start0x40000000000000000
end0x7ffffffffffffffff
Interval size73786976294838206464 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.

Solution record

Catalog date
Block
884659
Evidence
Community report
Catalog label
Kowala
A spend proves key control, not a forum identity.
Transactions
mempool.space tx Solve transaction · Blockstream

Where the key sat in its range

Published position in range: 79.78%

0% · start of rangeend of range · 100%

Published historical scalar (already public)

This hex scalar is already in the public puzzle corpus. It is historical evidence, not a live key to import. This page does not produce WIF and does not handle secret material.

00000000000000000000000000000000000000000000000730fc235c1942c1ae

Mentioned in the atlas

Where #67 comes up in the room pages. rooms 3 · mentions 4

History
People
Myths

Method

Historical record. Method notes for open puzzles live on the method page.