Here are numbers and percentages to consider:

1 in 303 million

The number of possible combinations and odds of matching all five numbers and the Mega Ball.

$905 million

The estimated lump sum that a prospective Mega Millions winner could take home before taxes.

24 percent

The IRS' cut of the lottery winnings, which applies to any prize over $5,000. California does not take out additional state taxes on the prize, but winners should expect to pay up on their income taxes.

25 million

Number of tickets California State Lottery officials say had been sold, as of Monday afternoon, for Tuesday night's drawing.

32

The number of times Californians have won the jackpot since the state joined the Mega Millions draw. This includes an office pool in Santa Clara County in August, when 11 people cashed in on a $543 million ticket.

$13 million

The payout to San Francisco public schools this year to date, according to a California State Lottery report. Each quarter, the state controller's office audits the amount raised by California State Lottery ticket and scratcher sales and cuts a check to each institution.

$1.9 million

How much a lucky Safeway bakery employee's Mega Millions ticket netted him last week when he matched the first five numbers.

$1.3 billion

Funding that Californian public schools have received this year from lottery drawings. K-12 schools get most of the funds, while a smaller amount goes to the Californian Community College, California State University and University of California systems.

$107 million

The estimated amount that Californian public schools will receive from tickets sold for Tuesday's draw.

2

The number of California Lottery district offices in the Bay Area. Winners could go to Richmond or Hayward to submit their claim forms.

46

States and territories (including Washington, D.C., and U.S. Virgin Islands) that are part of the Mega Millions draw. Nevada, Utah, Mississippi, Alabama, Alaska and Hawaii do not participate.

1-800-426-2537

The toll-free phone number for the California Council on Problem Gambling. Lottery officials say people seeking counseling for a gambling addiction can also text SUPPORT to 53342.