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Internet Explorer common version numbers

Microsoft official numbers
Version number displayed	Internet Explorer version
4.72.3612.1713	IE 4.01 SP2
5.0.2919.6307	IE 5.01
5.00.3105.0106	IE 5.01 SP1
5.00.3315.1000	IE 5.01 SP2
5.00.3502.1000	IE 5.01 SP3
5.50.4134.0600	IE 5.5
5.50.4807.2300	IE 5.5 SP2
6.00.243x.0051	IE 6.0 beta 2 public preview
6.0.2462.0000	IE 6.0 "Refresh" w/o Smart Tags (german)
6.0.2479.0006	IE 6.0 "Refresh" w/ Smart Tags (english)
6.0.2505.0000	IE 6.0 "Refresh" w/ Smart Tags (english) WinXP RC-1
6.0.3790.0	IE 6.0 Windows 2003 Server
Non-official numbers found on user PCs
Version number displayed	Internet Explorer version
5.00.2920.000	IE 5.0 128bit encryption