# 11

This number is a prime.

Just showing those entries submitted by 'Das': (Click here to show all)  At least one edge of the hypothetical perfect cuboid (or Euler integer brick) is divisible by 11. [Beedassy] The only number in base ten that is not Nivenmorphic ; In other words, 11 never divides a number ending in 11 if its sum of digits is also equal to 11. [Boscaro and Beedassy] The minimum prime p such that p ± 1 each has exactly 2 distinct prime factors. [Das] The smallest prime p such that the sum of digits of p divides the sum of digits of the pth prime. [Beedassy] The smallest odd Ramanujan prime. [Beedassy] The first number n that divides N-1, where N is the least common multiple of all numbers below n. [Beedassy] It suffices to pick up any 11 numbers among the first hundred to ensure getting a pair close enough for their square roots to differ by less than unity. [Beedassy] The smallest prime p whose next p primes starting with p add up to a prime (emirp) ending in p: 11 + 13 + ... + 43 + 47 = 311. [Beedassy] The smallest prime whose digits are both nonprime and noncomposite. [Beedassy] The smallest number of divisors which no number can have among the first thousand. [Beedassy] The highest prime dividing the number of yards, feet, or inches (basic US length units) that make up a mile. [Beedassy] Ekadashi (11 in Sanskrit) is the sacred eleventh day of each of the bright and dark halves of a lunar month. [Beedassy] Viggo Brun showed in 1920 that there exists a number with at most 11 prime factors between n and n + sqrt(n) for sufficiently large n. [Beedassy] With reference to the Ten Commandments of Christianity, "The Eleventh Commandment" is a term used to describe a rule or policy that is extremely important to the point of being sacred. [Beedassy] The YouTube online unlimited video-sharing platform uses a 11-character randomly generated code in base 64 to identify each upload. [Beedassy] There are eleven distinct nets on a plane that can be folded up to produce a cube. [Beedassy] The maximum number of turns required to solve the Mini Cube (the 2×2×2 equivalent of a Rubik's Cube) is up to 11 half or quarter turns. [Beedassy] 11π is the area enclosed inside the Cardioid with polar equation r = 3 + 2cosθ, where 0 ⩽ θ ⩽ 2π. [Beedassy]