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The Ulam Spiral or prime spiral is a graphical depiction of the set of prime numbers, devised by mathematician Stanislaw Ulam in 1963 and popularized in Martin Gardner's Mathematical Games column in Scientific American a short time later. …

Exactly what it sounds like.

This is my first attempt a prime sieve in assembly. It is largely a direct translation from a Sieve of Eratosthenes originally written in Java, so this program is not exactly optimally structured. Firstly, it stores all primes up to n in an array. Secondly, it counts the number of primes before n and stores that hexadecimal value in the EAX register. This is rough. There is much room for improvement, and I intend to revisit this program without using the MUL function.