LOL. You must first consider that even if you look at ancient history, Bengal's achievements are clearly limited. No part of the Vedas and the Upanishads is known to have been composed in Bengal.
The great advances of mathematics in the first millennium that came from the works of Aryabhata and his successors covered a huge span of the country -- from Kerala to Bihar -- but Bengal was out of it all. When al-Beruni, the great Iranian mathematician, roamed around the sub-continent in the early eleventh century in pursuit of the current state of Indian mathematics, he did not bother to visit Bengal.
There is nothing in Bengal's history to match the ancient glory of Patna or Ujjain or Benares, or the medieval splendour of Agra or Delhi or Jaipur.
Now before you complement me, just remember, the above posts were from their much admired intellectual Amartya Sen