primes

a powerpoint is here

[thanks to Tandi Clausen-May and Jerome Bruner]

I'm not sure it is worthwhile for students to undertake a prime search by Eratosthenes' sieve method but it's good that there's an animated gif that does it for you...

these are Brent Yorgey's images (math less travelled) showing the sieve results for 1 to 100 and for 1 to 840

why all the parallel lines?
















and a presentation by Visnos