List Number Prime - Software for exploring the Prime Number Spiral (a.k.a. the Ulam Spiral)

Prime Number Spiral 7.42
The Prime Number Spiral (a.k.a. the Ulam Spiral) is formed by marking the prime numbers in a spiral arrangement of the natural numbers. This is software is for exploring the Prime Number Spiral.
prime number spiral, prime numbers, primes, program, ulam spiral, software, mathematical software, graphics software, calculator number prime, list number prime,