10000...23051 (500-digits)

This number is a prime.

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10^499+174295123052 +/- 1 are both twin primes and emirps. This is the largest known case (as of 2009) and the smallest case with 500 digits. [Andersen]

Submitted: 2009-09-18 02:24:48; Last Modified: 2009-09-18 03:00:45.