The record before 2018 was block [409,069](https://mempool.space/block/000000000000000001569ae442a9081b2da0d7813b4af8c8999e830c39ece1eb) in which 23,642 outputs had been created.

I found these blocks by [sorting blocks per their output counts on blockchair](https://blockchair.com/bitcoin/blocks?s=output_count(desc)#f=id,hash,time,guessed_miner,transaction_count,output_total,output_total_usd,fee_total,fee_total_usd,size,output_count)

This [2018 Coinmetrics article](https://coinmetrics.io/batching/#:~:text=Additionally%2C%20each%20transaction%20can%20have,20%2C000%20inputs%20and%2013%2C107%20outputs) claims the record then was 13,000 outputs, but they don't link to a transaction, so it's not that useful. 

Scoresby

Note that this figure is for P2TR outputs (because I restricted myself to the same input and output script type). It looks like 26,908 outputs were created in [block 826,052](https://mempool.space/block/00000000000000000002156069fcdca4ef9418f1654105b450a9a6d28f807080).

Murch

The link says we can create around 23k UTXO'S per block (P2TR). Has anyone ever done this on mainnet? I think the the most I've seen is around 4k outputs

bitcoin

Is custodial bitcoin really worth anything?

The link says we can create around 23k UTXO'S per block (P2TR). Has anyone ever done this on mainnet? I think the the most I've seen is around 4k outputs 