[ben174]

Thank you. I was going crazy trying to think of what the contents of that 42 bytes would have been.

[rootlocus]

Without any headers, metadata or padding and using RLE one byte for 0 and 8 bytes for the number of zeroes: 10^15 will easily fit 9 bytes and can be used to generate a file filled with one petabyte of zeroes.

[gberger]

Well, yes, but that's not ZIP encoding.