Need to find change log of a sap background job and creation date

Hi All,

one of my lob is in cancelled state and its a monthly job, i was checking whether it was finished succesfully last time or not but in SM37 i am not getting any result,because reorg job already deleted logs, now my question is how can i find this information, i checked SAP tables TBTC* but coud't find any information,

i just want to know all change logs of a job, when it was created, when it was run first time and if reorg job deleted old background job logs how can we find the information if needed.

Thanks and Regards,

KK