%A J Petke %A W Langdon %X Automated search in the form of the Covariance Matrix Adaptation Evolution Strategy (CMA-ES), plus manual code changes, transforms 512 Newton-Raphson floating point start numbers from an open source GNU C library, glibc, table driven square root function to create a new bespoke custom mathematical implementation of double precision binary logarithm log2 for C in seconds. %O This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. %D 2019 %T Genetic Improvement of Data gives Binary Logarithm from sqrt %K genetic programming, GI, search based software engineering, SBSE, software maintenance of empirical constants, data transplantation %L discovery10074376 %V 2019 %C New York, NY, USA %J Genetic and Evolutionary Computation Conference %I Association for Computing Machinery (ACM) %P 413-414 %S Genetic and Evolutionary Computation Conference (GECCO) %B Proceedings of the 2019 Genetic and Evolutionary Computation Conference (GECCO)