https://www.youtube.com/watch?v=Ua04HEx_zdk
Of course its nearly impossible to crack any normal generated addresses but as I said, just doing it for the fun )
Here is what i did:
1. Grabbed all unique public keys in the blockchain and placed them in a local Database
2. Coded an app to generate private keys from Bigints (Both compressed an uncompressed) with multiple RNG types
3. For each PVK generated the app checks the Database for a possible public address match
4. A txt file is created with the PVK and Public address in case of a match
5. I will run the app for the next 464656656565656566565646367618239128323718298319239129309 years to see if I get any good addresses ))
I got dozens of used addresses but they were all empty already.
Also did with dictionary attack and got dozens of used addresses, all empty also.
I wonder if you did gained anything from your work...