def solve():
"""
>>> solve()
142913828922
"""
primer = CachedPrimer()
known_primes = primer.primes_up_to(2000000)
return sum(known_primes)
def solve():
"""
>>> solve()
104743
"""
primer = CachedPrimer()
primes = primer.primes_up_to(stop_at_n_primes=10001)
return primes[-1]