No college basketball fan is going to take home the $10 million grand prize offered in an on-line fantasy sports site’s contest, although an amazing 56 people made it to Saturday’s second round by correctly picking the result of the first 32 games before bowing out.

In all, 610,705 people entered the contest at Sandbox.com, which promised to hand out $10 million if anyone could correctly guess the outcome of all 63 games of the NCAA men’s basketball tournament.

The odds of doing so are so long it is almost impossible, statisticians said.

But $10 million is nice money, so the contest attracted a crowd. Why not, it was free.

All but two of the 56 who made it to Saturday dropped out after sixth-seed Purdue defeated No. 3 Oklahoma early that day. The final two contestants bit the dust after No. 1 Arizona was sunk by Wisconsin.

Despite lasting just a dribble or two longer than 48 hours, the contest was a marathon compared to the $1 million game last which lasted just hours into the first day.

Sandbox.com execs have not made up their minds about the structure of next year’s contest, including format or prize money, but have said that “$64 million does have a nice ring to it.”