On Mon, Oct 1, 2018 at 12:44 AM David Mertz <me...@gnosis.cx> wrote: > > On Sun, Sep 30, 2018 at 10:23 AM Chris Angelico <ros...@gmail.com> wrote: >> >> On Mon, Oct 1, 2018 at 12:18 AM David Mertz <me...@gnosis.cx> wrote: >> > Bonus points for anyone who knows the actual maximum size of Python ints >> > :-). >> >> Whatever the maximum is, it's insanely huge. >> Want to share what the maximum actually is? I'm very curious! > > > Indeed. It's a lot bigger than any machine that will exist in my lifetime > can hold. > > int.bit_length() is stored as a system-native integer, e.g. 64-bit, rather > than recursively as a Python int. So the largest Python int is > '2**sys.maxsize` (e.g. '2**(2**63-1)'). I may possibly have an off-by-one or > off-by-power-of-two in there :-). >
Hah. Is that a fundamental limit based on the underlying representation, or would it mean that bit_length would bomb with an exception if the number is larger than that? I'm not sure what's going on. I have a Py3 busily calculating 2**(2**65) and it's pegging a CPU core while progressively consuming memory, but it responds to Ctrl-C, which suggests that Python bytecode is still being executed. ChrisA _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
