by Edward Precht. @pertoltprecht. NEW YORK, NY – The secret to a great piece of art is a great, unanswerable question, and, in the case of Proof – now playing at the Booth Theatre – that question is the authenticity of a newly-discovered mathematical formula. Earlier today, the brightest minds behind The Broadway Beat announced they’d solved said formula, and it turns out it’s “80085,” also known as the…