A request for samples to work with.

I need 4 heavily randomized, entropic files. Max size of 64kb (I am
converting it to 0's and 1's in a text file, so it will be 512kb
then... which is the maximum of the tool)

These files should be unable to be further compressed by any existing
compression utility.

I have just successfully done one test, but I used a central portion
of the Calgary Corpus file since it was to large as a whole. I used
7zip to compress, and obtained admittedly only a few bits of
compression in several different locations after accounting for a
command section, and identification, and only if I quadrupled the
estimated file size to increase the 'number of bits saved'.

This is bad sampling and I admit it. Therefore I am asking for help
generating the admittedly necessary test files.

4 should give me a baseline to see if I am being successful or not.
.

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