I remember reading some pages back someone suggesting that anything above 90 is safe from bots instantly stealing your private key.
You can experiment yourself with #70, #75, etc and see how long it takes on your hardware, and based on how good it is, account for people who have a lot of hardware more powerful than yours.

How to defeat the bots: burn the 6.6 BTC in miner fees in the first transaction.
Nobody wins except the miners.

Barely caught it myself. I guess this confirms that anything under 90 or 100 is a waste of time.
Thank you for the experiment, brazilian man.

Good luck cashing out those BTC without some agency tracking you down in an instant and start asking questions (and the money back)

Please consult a specialist as you might be affected by schizophrenia.

I also tried to predict #66 in a similar way but the ranges I got are still too big to do anything useful. I don't have high end hardware to test the predictions either, and the ranges I got are around 40% of the total range.
Factoring in that most likely the beginning and end of the ranges have been searched already, and doing other basic assumptions, you can reduce the range down but it's still too big.
Furthermore, now I am trying my luck on #130 because why not. It is very unlikely that #66 will get in my hands (or yours) so I just gave up on that.

these last pages read like schizoposting.

anyway
what stops someone from sending invalid / badly signed TXs to the network so the bots are bogged down cracking the #66 with bad pubkeys? how does the network react in this case? does it just drop the bad transaction? or is it just not possible?
i could not find much on the subject of crafting invalid TXs, as i assume any wallet program will just refuse to send a TX due to invalid signature.