83

This number is a prime.

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Gus Lascar © 2003

The first prime in the decimal expansion of the Gauss's constant G, defined as the reciprocal of the arithmetic-geometric mean of 1 and sqrt(2). Note that G = 0.83462684167.... [Capelle]

The largest known prime number p such that 2^p does not contain the prime digit 2. [Capelle]

The largest known prime number that can be expressed as the sum of three positive triangular numbers in exactly one way. [Capelle]