Suresh Nayak. C (born on May 20, 1972) a mentally challenged telephone operator from Puttur, Karnataka, recalled 204 names from his telephone directory containing only numbers, within a duration of 1 hour and 12 minutes on May 12, 2012, at Sriram Shares way 2 health office, Puttur, Karnataka. The diary contained total 518 telephone number, Suresh recalled the owners of the individual telephone numbers which were written in the directory and also performed its vice-versa