This page of the First 1,000 prime numbers has html and css for one to 7,919 – enough for one thousand prime numbers to be shaded gray. The fun though, is that if you re-size the browser (or use firebug to change the css), the primes align themselves in visually interesting patterns.
Resizing to line returns on multiples of 30 (or just 6) will illuminate much of what people seem to note about the “Sieve of Eratosthenes”, namely that multiples of 2,3, and 5 dice the primes into columns.