Package: pari

Version: 2.6.2�(development 15281-15d6bae)

I noticed that when I run sumnum I don't get more precise output after 38 digits. The calculations take longer, but no more digits are returned. I expected to see output precision increase (even if not as high as input precision due to cancellation) but I don't see any increase at all.

> f()=sumnum(n=1,1,-log(cos(1/n)));

> #

> \p 38

> f()

time = 113 ms.

%2 =�0.94536905472633293526609521540827019799 + 0.E-33*I

> \p 308

� �realprecision = 308 significant digits

> f()

time = 3,417 ms.

%3 = 0.94536905472633293526609521540827019712 + 0.E-32*I

> \p1001

� �realprecision = 1001 significant digits

> f()

time = 29,858 ms.

%4 = 0.94536905472633293526609521540827019613 + 0.E-31*I

These were run on a 64-bit system, in particular

amd64 running linux (x86-64/GMP-5.0.1 kernel) 64-bit version

Charles Greathouse
Analyst/Programmer
Case Western Reserve University