77771...34343 (194-digits)

This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).

                 7777 1111111111 1313131313 1317171717 1717171919 1919191919
1923232323 2323232323 2929292929 2929292929 3131313131 3131313131 3137373737
3737373737 3737374141 4141414141 4141414141 4143434343 4343434343 4343434343

The smallest googol prime concatenating nth prime , n times, from n = 4 to 14. [Gupta]