How difficult is it to break the OpenPGP 40 character long fingerprint?

[Robert J. Hansen]

On 04/02/2013 03:08 AM, Niels Laukens wrote:
> If you're running a computer at 3.2K (ambient universe temperature,
> anything below that would require additional energy to cool it), a
> bit-flip requires 4.41E-23 Joules of energy.

Off by a factor of ln 2 there, chief.  :)  Required energy to destroy a
bit of information (not necessarily flip a bit) is about 3.06 * 10**-23
joules.