test(N)=
{
  default(primelimit, N);
  for (b=10, 20, print1(prime(2^b), " "));
  for (b=10, 26, print1(primepi(2^b), " "));
}

test(10^6);
test(10^8);
primepi(2^32)
precprime(1)
primepi(2750160) \\ #1855
