50043...65969 (206-digits)

This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).

    500433 2916611659 1289714877 8141242848 0653778995 2091363273 1187020354
8235945494 4447408720 1871206803 0269557663 2596455570 3589092220 3836242699
8635327718 7370736800 9506924573 7886063381 9459664462 6871944682 9950565969

The smallest probable prime that can be expressed as the sum of five consecutive triangular numbers each raised to power its next triangular number: (45^55 + 55^66 + 66^78 + 78^91 + 91^105). [Bajpai]