"It's a wonder that every jackpot doesn't roll up to a billion plus"
Probability is different than the arithmetic we normally use for a lot of other things, and not very intuitive. The number of combinations sold isn't linear, so selling twice as many tickets doesn't use twice as many combinations. With small sales there aren't a lot of repeats, so selling 30.26 million tickets (about 1/10th as many tickets as possible combinations) would use 9.82% of combinations. Doubling sales to 60.52 million would use 18.13%, so fairly close to twice as many combinations.
As you sell more and more tickets the number of repeats starts to increase dramatically. It takes about 210 million tickets to use 50% of the combinations, but doubling that to 420 million tickets would only increase the number of combinations used to about 75%. To use 99.999% of combinations (theoretically leaving 3026 unsold combinations) would take 3.5 billion tickets.
It takes a lot of tickets to have a very high chance of a winner, but only a modest amount of tickets for a decent chance of a winner. Sometimes it takes a billion tickets to produce a winner, but other times there's a winner when that was only a 10 or 20% chance. In the long run we can expect about one winner for every 302.6 million tickets sold. At current interest rates it takes about 830 million tickets to produce an advertised jackpot of $1 billion. The chances of selling 830 million tickets without a winner is 6.44%, so we can expect it to happen about once every 15 times.
"I used the 4 qtrs of equal payments."
That's what works almost all the time for almost all of us, and there's usually no need to worry about the unusual scenarios we don't deal with. If I actually win a jackpot or come into some other taxable windfall I can find out if there's anything new I need to know.
"It has both a 5 White and 5 Megaball, 3 numbers over 60 and the 70 which is rarely picked"
I really wish there was no such thing as a QP. Because most people either choose "special" numbers or think the way you do the average jackpot would be bigger and those of us who understand that every combination has the same chance would almost never have to share a jackpot. There's a very good chance that if QP's didn't exist I'd be playing for $2 billion now.