Prime Spiral
The numbers arranged in a Spiral
with Primes indicated in black, as first drawn by S. Ulam. Unexpected patterns of diagonal lines are apparent in such a plot,as illustrated in the above
grid.
References
Dewdney, A. K. ``Computer Recreations: How to Pan for Primes in Numerical Gravel.'' Sci. Amer. 259, 120-123, July 1988. Lane, C. ``Prime Spiral.'' http://www.best.com/~cdl/PrimeSpiralApplet.html.
Weisstein, E. W. ``Prime Spiral.'' Mathematica notebook PrimeSpiral.m.
- Dozen
- Dragon Curve
- Dragon Fractal
- Draughts
- Drinfeld's Symmetric Space
- Droz-Farny Circles
- Drum
- D-Statistic
- D-Triangle
- Dual Basis
- Dual Bivector
- Dual Graph
- Duality Principle
- Duality Theorem
- Dual Map
- Dual Polyhedron
- Dual Scalar
- Dual Solid
- Dual Tensor
- Dual Voting
- Du Bois Raymond Constants
- Duffing Differential Equation
- Duhamel's Convolution Principle
- Dumbbell Curve
- Duodecillion