Fix LongRange unit test issue and adjust MPC reference value. #5382
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Proposed changes
I took a close look at the issue raised by #5374
It seems to be
-ffast-mathrelated when compilingsrc/Particle/LongRange/tests/test_StructFact.cpp.I found a workaround by doing reduction in double precision in the unit test.
This PR also fixes #5377
What type(s) of changes does this code introduce?
Does this introduce a breaking change?
What systems has this change been tested on?
epyc-server
Checklist