19329...68691 (104-digits)

This number is a prime.

                                       1932 9908413609 1871820322 3731216831
2562683421 4686890206 7393853325 2330341724 1446818357 0166217690 8898368691

The start of a prime quadruplet such that the sum of any three is prime. It equals 4348454752*233# + 2657651 and is the largest known as of April 12, 2013. [Andersen]