23511...31319 (2055-digits)

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

The smallest titanic prime formed from the concatenation of the first n Sophie Germain primes, i.e., {2, 3, 5, 11, ...., 31253, 31319}, (case n=459). [Bajpai]