Primes up to  1280000    98610
Primes up to   640000    52074
Primes up to   320000    27608
Primes up to  2560000   187134
Primes up to  1280000    98610
Primes up to   640000    52074
Primes up to  5120000   356244
Primes up to  2560000   187134
Primes up to  1280000    98610