wikipedia:PAQ
Hutter Prize
Data compression: LZMA, xz, unxz, xz -t, xz -q, xz -T0, xz -9, zstd, Igor Pavlov, bzip2, gzip
xz, unxz
xz -t, xz -q, xz -T0, xz -9, zstd
bzip2, gzip
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