[seqfan] In search of prime concatenations of successive values of A006512 Greater of twin primes

[Jonathan Post]

It's fast to verify that 3511 is the smallest multidigit prime
concatenated from initial lesser of twin primes.  But not so easy for
the greater of twin primes (base 10).


Through 571319314361731031091391511811931992292412712833133494214334635235716016196436618118238298598831021
there are no prime multidigit concatenations of successive values of
A006512 Greater of twin primes.

What is the smallest such prime?