What is this? And what is its claim to fame?

this may help a bit more

Unearthed by: Abhishek , ramsaravana , nihit , Gammafunction , Vinod , uma , Sharath , Swetha , Arjun June , Tathagata Chatterjee , shivani , yaksha , srichand.

This is the famous root(2) tablet, pretty much the first known reference to an irrational number. See Abhishek or Yaksha’s comment for more details :)

Abhishek, ramsaravana, nihit, Gammafunction, Vinod, uma, Sharath, Swetha, Arjun June, Tathagata Chatterjee, shivani, yaksha and srichand