Hello,

I was working on a sieve of eratosthenes and ran into an error I don't understand.

>>> size = 10000000000
>>> l = [0,1]*(size/2)
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
OverflowError: cannot fit 'long' into an index-sized integer


Is there a type or something that I can do to prevent this error? Or am I on the wrong track for such large primes?

Thanks,
William Stephens
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