Hi,
   The question that's giving me goosebumps and sleepless night is how is this guy managing to get 26 GH/s with a single worker?

https://ethermine.org/miners/3509f7bd9557f8a9b793759b3e3bfa2cd505ae31

and this one 29 GH/s

https://ethermine.org/miners/558d2e1a5786848dfc24080aff7928da1c7d5c3a