I obtained a SHA-256 quasi-collision with 184 out of 256 matching bits (71.88%) using a geometric search.
Found in ~25 minutes on a Google Colab v5e-1 TPU.
Code and verification script:
https://github.com/POlLLOGAMER/SHA-256-Colision-Finder-NEW.i...
https://github.com/POlLLOGAMER/SHA-256-Colision-Finder-NEW.i...
OSF project:
https://doi.org/10.17605/OSF.IO/EA739
Not a full collision. Open to feedback.