In underground warez scenes, some crackers modify software metadata to evade detection or appear "special." A modified 3dsmax.exe file could have its version resource manually set to 25.0.0.0 (which would be read as "25,000" if a decimal is misplaced). Misreading 25.0.0.0 as "25000" is easy, creating a mythical version.
: Fully open-source and officially offers a "portable" .zip version that requires no installation. 3ds max version 25000 portable