What's the largest size OP_RETURN payload ever created?

What's the largest OP_RETURN payload ever created? In terms of pushed bytes after the OP_RETURN, not in terms of total transaction size, and not in terms of amount "burnt". Also just the payload itself, so excluding the data push op codes (e.g. OP_PUSHDATA4 <huge size>).

Since this will be a non-standard transaction, there are two categories: the largest IsPushOnly() and the largest !IsPushOnly(). See Why do standard OP_RETURN outputs also need to be IsPushOnly()?

I'm curious if the latter is used at all, but my question pertains to the former. That is, something a miner can create by setting -datacarriersize and optionally increasing MAX_STANDARD_TX_WEIGHT and no other patches.

An additional distinction could be made between the largest coinbase and non-coinbase OP_RETURN.



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