I would certainly start by trying to generate all possible 2-byte prefixes, 3-byte prefixes, etc. OK great, I did try that to get some insight as to whether va

I would certainly start by trying to generate all possible 2-byte prefixes, 3-byte prefixes, etc. OK great, I did try that to get some insight as to whether various 2/3/4-byte series at different index positions would show up... and they did. The relative lack of results by adding that 5th byte had me concerned, but figured it's due to the exponentially-decreasing odds. I'll have to read more on what you mean by #2/3. Clamping / bit entropy and the more intricate math is where I start to get lost. This seems like a good resource: https://www.jcraige.com/an-explainer-on-ed25519-clamping https://www.jcraige.com/an-explainer-on-ed25519-clamping Thanks for giving me some hope!