57971...19801 (121-digits)

This number is a prime.

                    5 7971261659 3046448428 1236500793 9098753888 1554693286
8281462767 8560665084 1830768773 8387490669 4304533953 4572251985 0644919801

(0+1)! + (2+3)! + (4+5)! + (6+7)! + (8+9)! + ... + (40+41)! is the smallest prime number greater than a googol of this form. [Marcel]