This postcard features a Ramanujan postage stamp from India...

It's signed from Brady and stamped across the bottom with our brown Numberphile Ink Stamp!

It's sent in the post (not an envelope) so it will come with all the stamps and wear-and-tear of a normal postcard that has journeyed through the postal system.

The front of the card features a hand-drawn Magic Square from a video yet to be released!

NB: These postcards have been sent to our Prime supporters on Patreon (for the month of May) and a small randomly-chosen selection of other Patreon supporters at lower tiers.

A few left-overs are being sold here so people can have a way to show some support for Numberphile.... Proceeds go towards making more and better videos.

Postage is included.