2022.07.31 18:21:35 (1553777906823749633) from Daniel J. Bernstein:
New paper "Fast norm computation in smooth-degree Abelian number fields": https://s-unit.attacks.cr.yp.to/norms.html Task amply studied for general number fields is much faster for cyclotomics. Critical subroutine in traditional class-group/unit-group computation, and in filtered-S-unit attacks.