16130...43483 (45-digits)

This number is a prime.

                           16130 4175444521 9983070755 0352354517 8845243483

161304175444521998307075503523545178845243483 = 2^13 + 3^13 + 5^13 + 7^13 + 11^13 + ... + 1999^13 + 2003^13. Found by Farideh Firoozbakht, 2003. [Rivera]