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Topic
Board Development & Technical Discussion
Re: Pollards kangaroo method to reverse engineer private keys
by
BurtW
on 06/03/2021, 15:34:59 UTC
Here is an experiment to determine the answer to your question

https://bitcointalk.org/index.php?topic=1306983.msg51460251#msg51460251

Brute force has claimed up to 61 bits.

Kangaroos have claimed up to 80 bits.
kangaroos have claimed up to 115 bits.
I think that is a new world record but would have to research it to make sure.  If so, the person who claimed the 0.115 BTC should get some fame for that - if they want the fame...