10 rupee note serial number after 999999, then which number........

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I have found one 10rupee indian currency note.The serial no of that is 7AW 999999 O.K. Now my question is one section of indian currency having 100notes.If the serial no of that 10rupeenote is starting from 999991 then the 99th note number is 999999,then what will be the 100 th rupee note? It will be 999999+1 = 1000000 ? But i have never seen 7 digit notes .If any body seen 7 digit notes like this? Clarify my question ,please...