2019.03.05 16:43:54 (1102957919392419840) from Daniel J. Bernstein:
Bo-Yin Yang and I have a new paper "Fast constant-time gcd computation and modular inversion": https://gcd.cr.yp.to/papers.html#safegcd Much faster than earlier constant-time Euclid variants. Case studies: new speed records for 2^255-19 inversion (even faster than Fermat!) and NTRU-HRSS keygen.