Max bitrate for H264 MP4 4K

Can anyone suggest what is the maximum bitrate possible for H264 MP4 4K lip?

(I am not looking for a bitrate calculator, because those found on the Internet are just calculating as if every bitrate is possible)

Chart at bottom. Recently "discovered" that greater than 4K is not possible

https://en.wikipedia.org/wiki/H.264/MPEG-4_AVC

Thanks.
I have a program that codes greater bitrates than "possible" - 300mbps while the maximum is 240mbps.
How is it possible? Here is the output from Mediainfo:

Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (isom/mp42)
File size : 123 MiB
Duration : 3 s 237 ms
Overall bit rate mode : Variable
Overall bit rate : 319 Mb/s
Encoded date : UTC 2018-02-20 09:39:36
Tagged date : UTC 2018-02-20 09:39:36
Writing library :

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L5.2
Format settings : CABAC / 3 Ref Frames
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 3 s 237 ms
Source duration : 3 s 170 ms
Bit rate mode : Variable
Bit rate : 319 Mb/s
Maximum bit rate : 300 Mb/s
Width : 4 096 pixels
Height : 2 048 pixels
Display aspect ratio : 2.000
Frame rate : 29.970 (30000/1001) FPS
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 1.268
Stream size : 123 MiB (100%)
Source stream size : 123 MiB (100%)
Language : English
Encoded date : UTC 2018-02-20 09:39:36
Tagged date : UTC 2018-02-20 09:39:36
Color range : Full
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
mdhd_Duration : 3237

Been using Media Encoder .. up to 300 is what I use. Even at 300 there is banding in foggy gradients, but it's fine for most work, generally speaking.