Google Images of Prime Spirals <https://www.google.com/search?q=google+images+prime+spirals&lr=&safe=active&as_qdr=all&tbm=isch&tbo=u&source=univ&sa=X&ei=gGTyVKKNOYa1sQSYjoGACg&ved=0CB8QsAQ&biw=1280&bih=856#safe=active&as_qdr=all&tbm=isch&q=+prime+spirals> On Sat, Feb 28, 2015 at 7:41 PM, W. Edwin Clark <wclark@mail.usf.edu> wrote:
Sack's spiral? <http://sevko.io/articles/prime-number-spirals/#toc-container>
On Sat, Feb 28, 2015 at 5:26 PM, James Propp <jamespropp@gmail.com> wrote:
I recently saw an article that mentioned a variant of Ulam's spiral in which the primes magically form parabolas rather than lines.
Can anyone provide a source?
Thanks,
Jim Propp _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com https://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun