Man pages matching name algorithm::checkdigits::m89_001 in section 3pm:

Algorithm::CheckDigits::M89_001.3pm.en	debian 10 / libalgorithm-checkdigits-perl
Algorithm::CheckDigits::M89_001.3pm.en	debian 11 / libalgorithm-checkdigits-perl
Algorithm::CheckDigits::M89_001.3pm.en	debian 12 / libalgorithm-checkdigits-perl