Diff — 3

Revision #695 → #970 · back to history

addedDivisibility rule of 3c021240f3f28

addedReverse/permutation divisible by 3c7646994ed47

addedDivisibility rule generalizes to bases ≡ 1 (mod 3)888f436d62ff

added3 is the second smallest prime, first odd primed3d59d6b2a14

added3 is twin prime with 5, cousin prime with 70b8d288d39d7

addedTriangle is smallest non-self-intersecting polygon657e1886a0a5

added3 is the first Mersenne primef0488e3fe614

added3 is the first of five known Fermat primes94e54840087e

added3 is the second Fibonacci/Lucas/Sophie Germain/factorial prime1e17d631f957

added3 is the second and only prime triangular numberd361887f4bc6

addedGauss's three-triangular-number theorem9e62c8d935d7

added3 is the only prime one less than a perfect squareae79dfb88996

addedIntegers modulo 3 form the smallest finite field of odd characteristic40b7f595daf2

addedElliptic curves in characteristics 2 and 3af8ae80bad77

addedThree non-collinear points determine a plane and a circle36085c9266ff

addedRotational symmetry of order 38018c8e83f5e

addedTriangle as a polygon with three edges and verticesc2930402285f

addedPythagorean characterization of the triad1cedea7b065e