# 283

This number is a prime.

The highest point on the territory of Minsk, Belarus is 283 meters above sea level. 283 is prime! [Kulsha]

283 = (6! - 5! - 4! - 3! - 2! - 1! - 0!)/2. [Vatshelle]

The smallest prime factor of the first composite numerator of a Bernoulli number.

The smallest prime number less than the sum of cubic roots of all primes up to himself. [Gallardo]

The largest non-titanic prime that can be expressed as the sum of two consecutive numbers to their own powers, i.e., n^n + (n+1)^(n+1), (n=3). [Patterson]

283 is the (2*8*3 + 2+8+3)th prime. Note that 283 is the smallest such prime. [Firoozbakht]

The first number n > 3 for which ((10^4n)+1)/10001 is prime.

The smallest prime adjacent to any amicable number. [Loungrides]

The Japanese robot-staffed Henn-na Hotel chain once "fired" 283 employees for incompetence. [Fukuda]

The smallest base-4 pandigital prime: 283 (dec) = 10123 (base-4). [Goelz]

Pennsylvania is 283 miles long, from east to west.

The Bonhoeffer Music Museum includes 283 blue, button-down Oxford shirts.

The Van der Waals radius of radium in picometers. [Morris]

283 is the smallest prime p such that the any divisor of p-1 or p+1 added to p produces no prime. Is 283 the largest prime that qualifies? [Bergot]

An equilateral triangle of side length 283 contains at least one point enclosed at integer distances from the vertices. It is the smallest equilateral triangle of prime number side length with this property. [Beedassy]

(There are 10 curios for this number that have not yet been approved by an editor.)