The image composed of 59,392 alternating white and black pixels.
The GIF with maximum possible height and width of one pixel. So probably the highest OBJKT on H=N.
Krzysztof Proembrion Syruć 'The highest OBJKT' 2021 Gdańsk, part of the #OBJKT4OBJKT event, GIF, 59392x1 pix.