Binny and Gautam were unbeaten on 115 and 132 respectively, having put on an unbroken stand of 215 runs for the fifth wicket stand to take Karnataka to 306 for four at stumps on the opening day.
Muralidharen Gautam carried on with his good form as he completed his double century to lead Karnataka to a mammoth 619 for eight on day two of their Ranji Trophy Group B match against Vidarbha, in Mysore on Sunday.
Muralidharen Gautam smashed a brilliant double hundred to become the season's leading run scorer as Karnataka declared their first innings at a massive 572 for nine on the second day of their last Ranji Trophy group league match in Pune on Sunday.
Ganesh Satish struck his maiden first class double hundred and stumper Muralidharen Gautam scored an unbeaten 130 to lead Karnataka to a narrow 24-run first innings lead over Chennai in their Group B Ranji Trophy match.