Prime number generator fails for large limit values

[Scott Armitage]

The prime number generator PyPE.pemath.primes(n) fails for large values of n. In particular, it appears that it fails for n > 2^31-1, the integer overflow limit -- this may be a limitation in Python on the size of a list.

Version information:
  Python: 2.6.2
  lp:pype : 7

Error information:

>>> PyPE.pemath.primes(600851475143)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "PyPE\pemath.py", line 92, in primes
    sieve = [True] * (n+1)
OverflowError: cannot fit 'long' into an index-sized integer