<p>Putnam Math competition is one of the most prestigious math competition at undergraduate level in US. Harvard has a specific web site devoted to the Putnam, because Harvard has been a top winner most of the time: they want to show off. </p>
<p>Maybe MIT math department does not focus on Punam because they are behind Harvard team most of the time. </p>
<p>I also know that the top winners of high school math competition in US usually choose to attend Harvard math department and I guess that is why Harvard has been doing extremely well in that competition.</p>