23571...81191 (88-digits)

This number is a prime.

                                                         23571113 1719232931
3741434753 5961677173 7983899711 3127131137 1391491511 5716316717 3179181191

+ The largest prime less than a googol formed from the concatenation of the first n zerofree primes, (n=39). [Bajpai]

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