12158...81201 (101-digits)

This number is a prime.

                                          1 2158654505 5619002751 5123595453
0818210030 7234342292 8608573245 5128878559 7715892427 1456393173 3053281201

The first prime p that may be expressed as the sum of the first n successive odd numbers each raised to the power of itself. It happens for n = 29: p=1^1+3^3+5^5+7^7+...+57^57. [Loungrides]