2^74,207,281-1 what is the answer acording to http://web2.0calc.com/ calculator its -1+infinity
3.00376418084606182052986098359166050056 x 10^22,338,617
This is the largest known Mersenne prime number known to date. It consists of over 22 million digits.
If you were to print it on a long piece of paper, with very small print, your paper would have to stretch more than 22 kilometers or 14 miles long.