I'm not sure whether this subject has been discussen on the forum befor or not, but when I try to calculate the logaritm of large numbers with my new 20b I get the wrong answers.

Some examples (correct answer in parenthesis):

log(1e10)=10 (10)

log(1e15)=15 (14)

log(1e16)=10 (16) <- wrong answer

log(1e200)=128 (200) <- wrong answer

ln(1e15)=34.538... (34.537...)

ln(9.99999999999e15)=36.841... (36.841...)

ln(1e16)=23.025... (36.841...) -> wrong answer

The error seems to appear at log(1e16) and above and for both ln and log. Also y^x (which I assume uses ln) gives the wrong answers for large arguments:

1e16^.5=1e5 (1e8) <- wrong answer

while sqrt(1e16)=1e8

My unit is has serial number CNG82804713 and is brand new.

Has anyone observes these errors before and will there be an update of the calculator software to correct the bug.

Appart from this bug and the hopeless fell of the keyboard I think the 20b is a nice calculator combining business function with trigonometric functions and statistical distributions.

Regards, Michael