Zoffix has posted his June Report.
Most of the work on constants has been completed; Some bad math on zero-denominator rationals has been fixed.
As Zoffix works through these issues, some work may find its way into ecosystem modules instead of core Perl 6.
You can read all the details at his June 2018
Note that Zoffix will be taking the next month off to focus on some other Perl 6 issues, but should return the following month.