28361...04509 (56-digits)

This number is a prime.

               283613 7820358161 1893021499 5270808706 6882123517 8133404509

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The largest prime less than a googol that is the product of a repunit number and all its truncations plus eight, i.e., 11111111111*1111111111….*1111*111*11*1 + 8 [Gupta]