I think logistics and risk the main reasons.  On average you can expect the jackpot to be split 3-4 ways, and the lump sum payout will only be ~900M.  I&#x27;m not sure what the other prizes add up to, but obviously they&#x27;re going to be significantly less than the jackpot.  So given that it would cost almost $600M to buy all the combinations, it is very possible that you could end up with a loss in the tens of millions, if not more.  It&#x27;s not the most likely result, but it would certainly be a consideration.<p>The bigger issue though is how much it would cost to buy and redeem ~300 million tickets.  Since you&#x27;re choosing your numbers, someone is going to have to physically type in each set of numbers at sale.  So at a minimum it&#x27;s going to take like 5 seconds per set just to produce them.  Or about 70 years, working continuously for 16 hours a day.  Obviously you wouldn&#x27;t do it all yourself, but even assuming retailers were willing to just continuously produce tickets for you all waking hours, you would need 4000 people working in parallel, 16 hours a day, to get the tickets printed in under a week.  And that&#x27;s just the time to physically type in the numbers.  They&#x27;re also each going to need to store and transport the thousands of tickets.  Then you have to redeem them, a process which would likely take longer.  So as a rough estimate, say 8000 person-days (8-hour days) overall.  Plus overhead for bookkeeping, management, etc.  Even so, that would only cost on the order of single millions; a rounding error compared to the jackpot.  But can you even find thousands of people willing and able to do this job?  They would have to be relatively trustworthy as well.<p>Given the risk, no one is going to lend you the money to do this.  So you would need access to half a billion dollars.  I imagine most people with those resources have better things to do with their time.  (Although if the draw were in a few months, maybe Donald Trump would have a go.)