What is my chance to find a block on a TestNet ? My gethashespersec is 4806082,  on the TestNet what is my real chance to find a block ?
You have almost 5MH/s, so at the current difficulty = 1787.78664453 and given, that base diff for testnet is 0.5 diff for main btc network, you can put this into calculator, and you get 


  9 days, 6 hours


. Hope this solves your case.