2 and 5 as simple sieves.......every other.......of course........3 is a more powerful sieve than 5....but for this argument..............2 cuts out 50% of the number line above it from being prime.......2 cuts out 50%.....another 25............-2, 0.......the 1st zero on the X axis.......1/2.....the line......5 cuts out 20 %.....b/c it cuts out everything that ends in a 0 or a 5......a 5 or a 0................2 out of 10.....0 - 9.......10 1 digit numbers..............5 and 0 are 2 out of ten..2/10.......is 1/5...........0.20........20 %............2 cuts out 50%..................a 2 and a 5.....and a zero..............5 cuts out a 2 ........20%......same sort of pattern................AND they overlap at every zero........everything that ends in a zero.....is even..................zeroes Dr. Riemann...symetery Emmy N............




25 % .......................12.5 percent is half of 25 percent..........1/2 again.....................12.5 % is also 12 1/2.%.........symmetry Emmy N.........