# 2861

This number is a prime.

7777/2861 is the fraction with the smallest prime denominator closer to *e* than 1650/607.

The largest known prime number that cannot be expressed as the sum of 3 pentagonal numbers. [Capelle]

The smallest prime which prefixed by the concatenation of two perfect numbers. [Firoozbakht]

Magnus Carlsen's peak rating is 2861, the highest in chess history.

Smallest prime that uses four distinct digits such that every different permutation of its digits is composite. [Vantieghem]

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