wrong output of np.lcm.reduce(*awg)

[zlwq]

BPO	44536
Nosy	@mdickinson, @zlwq
Files	a text for lcm() in numpy.py

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2021-06-29.15:36:52.636>
created_at = <Date 2021-06-29.14:55:23.108>
labels = ['3.8', 'docs']
title = 'wrong output of np.lcm.reduce(*awg)'
updated_at = <Date 2021-06-29.15:36:52.635>
user = 'https://github.com/zlwq'

bugs.python.org fields:

activity = <Date 2021-06-29.15:36:52.635>
actor = 'mark.dickinson'
assignee = 'docs@python'
closed = True
closed_date = <Date 2021-06-29.15:36:52.636>
closer = 'mark.dickinson'
components = ['Documentation']
creation = <Date 2021-06-29.14:55:23.108>
creator = 'zlwq'
dependencies = []
files = ['50133']
hgrepos = []
issue_num = 44536
keywords = []
message_count = 2.0
messages = ['396742', '396744']
nosy_count = 3.0
nosy_names = ['mark.dickinson', 'docs@python', 'zlwq']
pr_nums = []
priority = 'normal'
resolution = 'third party'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue44536'
versions = ['Python 3.8']

[zlwq]

np.lcm.reduce([1,2,3,100])
Out[125]: 300

np.lcm.reduce([1,2,3,100,101])
Out[126]: 30300

np.lcm.reduce([1,2,3,100,101,99019])
Out[127]: -1294691596

30300*99019
Out[128]: 3000275700

[mdickinson]

It looks as though you're reporting an issue with NumPy; this tracker is for the Python core language, which doesn't include NumPy.

For NumPy bugs, use the NumPy bug tracker at https://github.com/numpy/numpy/issues. (Though I don't think this _is_ a NumPy bug: it's simply the result of integer overflow in NumPy.)