The site is under maintenance.
Most probably the CPANTS databases are being regenerated from scratch behind the scenes due to the major change in Kwalitee metrics or the update of relevant modules/perl. Usually this maintenance takes about a day or two, and some of the information may be old or missing tentatively. Sorry for the inconvenience.
Math-BaseCalc-1.017 has the following 2 errors.
|valid_signature||WARNING: This key is not certified with a trusted signature!
Primary key fingerprint: ADCB DB05 B40E B2A2 A555 5462 82BB CC04 B7EF 9476