In my experience (Magma V2.22-7 for Linux) Magma is very slow at reading large polynomials from a text file.
Furthermore, it is unable to read ("load") a file larger than about 2 meg. Therefore, some of the large
examples here had to be split up among several (or many) files. In the list below, those examples are preceded
by a file called "...load" that will read in all the data.