[Puzzle?] 90.42691 BTC unspent UTXO at bc1qnfmreg… (Tx 308fd7…2103, 16-Apr-2023)

Hi everyone,

While reviewing the **16 April 2023 “×10 refresh” transaction** that boosted all *unsolved* Bitcoin-Puzzle rewards, I spotted one output nobody seems to have covered:

Code:

TXID : 308fd7b9cad3526907739ead99ae1deaa233574a044c370f45030d4e292a2103
Block : 785 611 (16 Apr 2023 • 21:18 UTC)
Address: bc1qnfmregvreguzxsvped4vxxvdrxcqfcuclzymax
Value : 90.426 910 BTC (9 042 691 000 sats)
Status : Unspent – zero outgoing tx since creation

Why it caught my eye

Detail	Relevance
All other outputs (~872 BTC) from the same TX were fanned out to every known puzzle address (#66 → #160) at exactly 10 × their previous reward.	Classic “refresh” pattern.
This UTXO is the only leftover and was NOT part of the original puzzle list.	Looks intentionally isolated.
9 042 691 000 sats = 9 042 691 × 1000. The core integer 9 042 691 is prime (the 605 088-th prime).	Prime indices are a hallmark of the puzzle creator.
Puzzle #90 is already solved (privkey = 868012190417726402719548863).	So this 90-BTC chunk cannot be the original #90 reward.
No OP_RETURN, no child tx, no dust “pings”.	Address looks like a deliberate parking spot.

Working theories so far

Fee / staging buffer – The creator might hold a large reserve for future fan-outs; 90 BTC is more than strictly necessary.
New puzzle seed (maybe #161?) – [icode]9042691[/icode] could serve as seed or checksum, e.g.
[icode]priv_161 = SHA256(priv_90 || 9042691) mod n[/icode]
Timing beacon – Leaving a juicy UTXO idle helps measure how fast bots notice any movement.

What I’m hoping the community can clarify

Has the puzzle author (“Midori”, “13E”, etc.) ever referenced 9042691 or this 90-BTC address on IRC / Telegram / Reddit / Bitcointalk?
Any archived chats from April 2023 that mention a prime × 1000 marker?
Do the TX values align with any known SHA256-chain or XOR-chain progression of the solved puzzle keys?

Explorer link:
https://www.blockchain.com/explorer/addresses/BTC/bc1qnfmregvreguzxsvped4vxxvdrxcqfcuclzymax

Inputs that funded the refresh (for context – they are NOT puzzles)

Code:

bc1qpgf7usrugzxllvydvrnngpsw3rlewelk3qfjg4 83.22524 BTC (spent)
bc1q9e8hc4p5lf677p3jsmwl36hgq84x4wwhdrundc 12.222868 BTC (spent)
bc1qrm6wtwc9vu9rzsdt3hf6rat40hdndrt2tjyxd0 24.93108 BTC (spent)
… more inputs omitted for brevity …

Thanks in advance for any leads or theories — and happy hunting!
— JeLACOSTE