5 Nov 2026
XMR20 project has seemingly embedded a 21-second MP4 music video in the Monero blockchain earlier today, after reportedly mining the largest XMR transaction recorded to date (599,000 bytes) in block 3799494:
We just made Monero history [..] 598,945 bytes of that transaction sit in tx_extra, a field Monero nodes relay only up to 1,060 bytes; At 565 times the limit, it could never pass through the mempool. So we built it into the block’s own coinbase transaction and mined block 3,799,494 ourselves [..] The pool has stopped mining for now; the block stays.
The block was automatically penalised and the miner only received ~0.00399 XMR instead of the default ~0.6 XMR block reward, due to the ~1 KB tx_extra maximum size limit that was implemented to mitigate damage done by Mordinals/NFTs in 2023.
Consult the previous Monero Observer reports to learn more about this story.
This is an ongoing story and the report will be updated when new information is available.
