23571...19141 (142-digits)

This number is a prime.

                                                                          23
5711131719 2329313741 4347535961 6771737983 8997101103 1071091131 2713113713
9149151157 1631671731 7918119119 3197199211 2232272292 3338335643 9333119141

The smallest prime of the form 2^n+concatenations of first n prime, case n=57. [Sariyar]