Just in case someone in the future wonders about similar things:
As far as I can tell Hanke uses a different L series than Conway and Sloane.
But he also uses a different definiton for the standard_p_mass.
Both seem to replace the discrimiant by the fundamental discrimiant. I 
guess both changes cancel each other out. But I have not checked it.

On Wednesday, October 3, 2018 at 3:21:16 PM UTC+2, Simon Brandhorst wrote:
>
> Apparently things are much simpler. It appears it is not a mathematical 
> error, but rather a computational. Frederic Chapoton added a 
> mass.canonicalize_radical()
> to deal with the symbolic part of the computation.
>
> I am now testing this against magma for a few thousand lattices of small 
> determinant and it seems to work so far :-)). It seems that I missed 
> something. Maybe the two L functions are the same after all - even if they 
> look slightly different.
>

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