[Python] Python: getrefcount for integer returns memory address

I do not get the behavior of getrefcount in Python for an integer value.

>>> import sys
>>> sys.getrefcount(1)
4294967295


The return value looks more like a memory address to me. Searching StackOverflow, I've seen examples like this Why does sys.getrefcount give huge values?

But I do get different return values

>>> a = 10
>>> getrefcount(a)
4294967295


This is Python 3.13.7 on MacOS 15.6.1

Thanks for any hints. If there were changes in behavior of getrefcount, I'd appreciate a link.

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