This is totally harmless and is not dangerous in any way. It's actually just plain silly.

It was a partially boring day today, so I created a ZIP-archive containing enourmous amounts of harmless data. As I felt that the classic 42.zip archive ( http://www.unforgettable.dk/ ) didn't contained enough data (only 4 PB - Peta Bytes) I felt I just had to make an even larger archive.

The archive is to be considered a ZIP-bomb ( http://en.wikipedia.org/wiki/Zip_bomb ) and contains 4ZB (Zetta Bytes) of fine zeroes.

The archive, which is only 6kB small, is nested in eight layers. The top layer contains an archive that contains an archive of 32 archives that contains 32 archives of ... 32 archives containing 32 4GB files, each filled with zeroes. Just for the fun of it each 4GB file has the extension DLL. Of course it's not DLLs, it's just zeroes but as most antivirus softwares scan DLL files, the scanning process will "take some time".

Archive structure:
litterature * 1*libraries * 32*library * 32*volume * 32*book * 32*chapter * 32*part * 32*section * 32*page * 32*column * 32*DLLs (as said, just zeroes).

This gives us:
2^72 bytes (= 32^8 * 4*2^30) which is 4.72*10^21 bytes which is...
4.61*10^18 kB (Kilo bytes) which is...
4.50*10^15 MB (Mega bytes) which is...
439,804,651,112 GB (Giga bytes) which is...
4,294,967,296 TB (Tera bytes) which is...
4,194,304 PT (Peta bytes) which is...
4,096 EB (Exa bytes) which is...
4 ZB (Zetta bytes)

That's HUGE! :-)

By the way, the mass of the Earth is estimated to be around 5971 ZkG (Zetta kilograms). Thus, the archive contains only roughly 0.69 bytes per metric Zetta ton of Earth mass. Intresting fact indeed. The earth is heavy.