We can get a list of the ordinals at: https://archive.org/details/bitcoin-ordinal-inscriptions.csv and then sort them by payload size with:
``
sort -k6 -n -t, ordinals.csv -o ordinals-sort-size.csv
``

This shows to us that as of block ~831k, there are 4 ordinals which are far far larger than any other between 3 MiB and 4 MiB, at about 10x larger than then 5th one d115a6e689086fd587e5032f24ba2a8c01f2f87cba758c9d5eb8cf7f6e9a816a

In those cases, a single inscription takes almost the entire block, and the inscribers must have had direct dealings with their mining pool:
* https://ordinals.com/inscription/4af9047d8b4b6ffffaa5c74ee36d0506a6741ba6fc6b39fe20e4e08df799cf99i0[]: 3,946,469 bytes (image/jpeg). <#Bitcoin Magazine> cover showing the face of <#Julian Assange>. https://www.blockchain.com/explorer/transactions/btc/4af9047d8b4b6ffffaa5c74ee36d0506a6741ba6fc6b39fe20e4e08df799cf99[tx 4af9047d8b4b6ffffaa5c74ee36d0506a6741ba6fc6b39fe20e4e08df799cf99, block 786501] (2023-04-22). Mined by <#Terra Pool>.
* https://ordinals.com/inscription/0301e0480b374b32851a9462db29dc19fe830a7f7d7a88b81612b9d42099c0aei0[]: 3,915,537 bytes (image/jpeg). <Taproot Wizards> ad. This was apparently the largest block ever mined at the time: https://www.reddit.com/r/Bitcoin/comments/10r6t1l/the_first_4_mb_block_in_bitcoin_history_mined_by/[] and received some notice. https://www.blockchain.com/explorer/transactions/btc/0301e0480b374b32851a9462db29dc19fe830a7f7d7a88b81612b9d42099c0ae[tx 0301e0480b374b32851a9462db29dc19fe830a7f7d7a88b81612b9d42099c0ae, block 774628 (2023-02-01)]. Mined by Luxor pool.
  \Image[https://web.archive.org/web/20230511232827im_/https://ordinals.com/content/0301e0480b374b32851a9462db29dc19fe830a7f7d7a88b81612b9d42099c0aei0]
  {title=Ordinal \#652}
  {source=https://ordinals.com/inscription/0301e0480b374b32851a9462db29dc19fe830a7f7d7a88b81612b9d42099c0aei0}
* https://ordinals.com/inscription/79b91e594c03c8f06d70c44a288a88a413c540abca007829ca119686a7f979dai0[]: 3,878,842 bytes (image/webp). "Bitcoin War Bonds". A spoof of something. No time to understand now. https://www.blockchain.com/explorer/transactions/btc/79b91e594c03c8f06d70c44a288a88a413c540abca007829ca119686a7f979da[tx 79b91e594c03c8f06d70c44a288a88a413c540abca007829ca119686a7f979da, block 777945 (2023-02-23)]. Mined by <#Terra Pool>.
* https://ordinals.com/inscription/b5a7e05f28d00e4a791759ad7b6bd6799d856693293ceeaad9b0bb93c8851f7fi0[]: 3,379,682 bytes (video/mp4). Short looping video of a "purple frog drinking from a glass with a straw". Yes you heard that right. TODO context? https://www.blockchain.com/explorer/transactions/btc/b5a7e05f28d00e4a791759ad7b6bd6799d856693293ceeaad9b0bb93c8851f7f[tx b5a7e05f28d00e4a791759ad7b6bd6799d856693293ceeaad9b0bb93c8851f7f, block 776884 (2023-02-16 )] Despite being huge, this received very little attention, the only <Google> mention is at <An overview of recent non-standard Bitcoin transactions by 0xB10C>. Mined by <#Terra Pool>.

As of 2024, all of the big ones were made in early 2023, so it seems that the trend has died down a bit.


Cool data embedded in the bitcoin blockchain/largest ordinal inscription

ID: cool-data-embedded-in-the-bitcoin-blockchain/largest-ordinal-inscription