Hey guys,
Goldbach, a mathematician Proposed a theorem 350 years back. Its a simple theorem which is not yet proved.
It states “all positive even integers can be expressed as the sum of two primes“. According to Hardy “It is comparatively easy to make clever guesses; indeed there are theorems, like ‘Goldbach’s Theorem,’ which have never been proved and which any fool could have guessed”. It seems Faber and Faber was ready to offer $1000000 who can prove this conjecture between 2000 to 2002. But prize went unclaimed. Years are passing but the conjecture remains open 🙂 .