50 digits precision handheld calculator is it achievable or not?

[Thomas Klemm]

(01-17-2014 10:53 AM)Jean-Marc Wrote:  I think that the hp42s has 25 digits internal precision.

Probably mixed that up with the Free42 simulator.
What do you get with:

1E-24 ENTER
1 +
1 -

The result is 1E-24 on the Free42 app on the iPhone.

Cheers
Thomas