33145...13697 (41-digits)

This number is a prime.

                               3 3145523113 2533748625 7272825336 4605813697

A prime of the form (Pn)^Pn+(Mp)^2 =28^28+31^2. Note that the number of digits of this prime is 41 = Pn + Reversal(Mp), where Pn = perfect number and Mp = Mersenne prime. [Sariyar]