1-Turn off your device
2-Press and hold Power + Home + Volume[-] Buttonsuntil it boot to download mode
3-In this step you need flash Galaxy Grand Prime using ODIN, read here to detail flashing using ODIN, Use 2_cache_recovery_stock_mohan_sm-g530h.md5
4-After first flashing step are done, reboot device and once again boot into download mode (like step 1)
5-Flashing using 1_cfroot_sm-g530h_mohan.tar.md5 and wait until it`s reboot again
6-Boot in normal mode, go to application and find SuperSU application
7-Run SuperSU application , do cancel when it ask to disable KNOX notification
8-For SuperSU update binary, select Normal
Done XD