Curve X448 is one of the most widely used ECC methods and is defined in [RFC 7748]. This page will take the two vectors defined in the RFC, and check the output. [secp256k1 barebones][P256 barebones][P521 barebones][Curve 25519 barebones]. With X448, we have an input u-coordinate value (the x-value) and a scalar value, and we get an output u-coordinate. The vectors are:
Input scalar as a number (base 10): 599189175373896402783756016145213256157230856 085026129926891459468622403380588640249457727 683869421921443004045221642549886377526240828 Input u-coordinate as a number (base 10): 382239910814107330116229961234899377031416365 240571325148346555922438025162094455820962429 142971339584360034337310079791515452463053830 Output u-coordinate: ce3e4ff95a60dc6697da1db1d85e6afbdf79b50a2412d7546d5f239f e14fbaadeb445fc66a01b0779d98223961111e21766282f73dd96b6f