60828...19801 (63-digits)

This number is a prime.

       608 2819836565 2187889282 3650866117 8482430288 1245096785 0644919801

(0+1)! + (2+3)! + (4+5)! + (6+7)! + (8+9)! + (10+11)! + (12+13)! + (14+15)! + (16+17)! + (18+19)! + (20+21)! + (22+23)! + (24+25)! is the largest prime of this form smaller than a googol. [Marcel]