Just curious if it is possible for a block to not be able to generate an answer (go through every possibility)?  I wonder if anyone has analyzed how many possible answers there are for the various difficulties?

Also a tech question / idea for Kano...  Are shares distributed sequentially or randomly to miners around the world?  It seems that randomly picking shares may improve our luck (may make it worse too).  I am a 30+ year web / c++ developer that has combined dedicated servers into a worldwide distributed digital signage solution.  I have a concept on how to code random share distribution to deal with the trillions of shares.  I am tempted to code up my own pool but have no idea where to start and have paying customers to keep happy.  Kano, if this is distributed sequentially, can we chat?