Prime spirals are always fun to watch(not...) and pretty brain hurting to implement. After 2 trials, Chao successfully created by far the fastest PHP prime spiral generator(for a 200*200 image, it's 20 times faster than the original)...
I challenge anyone to write a script that beat this one's speed
http://webdevlogs.com/2007/05/07/the-most-optimal-php-prime-spiral-generator-yet
I challenge anyone to write a script that beat this one's speed
http://webdevlogs.com/2007/05/07/the-most-optimal-php-prime-spiral-generator-yet
