It primarily uses the LZMA/LZMA2 algorithms, which provide significantly better compression ratios than ZIP, making it ideal for large file transfers.

The is an open-source, high-compression archive format developed by Igor Pavlov. It is widely considered superior to the standard .zip format for storage and security.

While "MMM28p" does not correspond to a public 7-Zip version (the current stable is 26.01 ), the .7z extension signifies it is an archive using the highly efficient . Format & Technology Review

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