I Found my first block too on slush during a 5 hour marathon, or right after. How do I check in block explorer my hash that found the block? Or how do I recognize it's from me?
If you don't log submitted shares, there's no way to check in blockexplorer which block you mined. If you're loggin submitted shares, then sha256(sha256(submitted_data)) == block hash on blockexplorer.