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> Total storage size: 663 TB available, 515 TB used

I was interested to see how they're storing the result (100T digits), it's not clear if this if memory for the result or for the algorithm. I'd be interested to hear what the encoding is; a byte/char per digit, or a nibble?

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I would imagine doing something like storing 12 decimal digits every 5 bytes (exploiting 10^12 <≈ 2^40) would be simple enough, great for random access, and good enough at compressing (within 10% of theoretical optimal treating pi as a random sequence of digits) that it's not worth spending a lot of time trying to improve upon that.

Of course, under a different set of constraints, one may find something better.

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