LUHN Formula for Validation of Account Number
The steps listed below are required for validation of the PAN (Primary Account Number).
Step 1: Double the value of the alternate digits of the PAN beginning with the second digit from the right (the 1st right-hand digit is the check digit).
Step 2: Add the individual digits resulting from Step One above to each of the unaffected (unused) digits of the original PAN.
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If the result from Step One is a two digit number, add each digit together to obtain a one digit result for Step Two.
- Step 3: The total obtained in Step Two must be a number ending in Zero (10, 20 etc.) for the PAN to be validated.
For Example, to validate the PAN 4062001210012105
4 | 0 | 6 | 2 | 0 | 0 | 1 | 2 | 1 | 0 | 0 | 1 | 2 | 1 | 0 | 5 |
x2 |
| x2 |
| x2 |
| x2 |
| x2 |
| x2 |
| x2 |
| x2 |
|
8 | +0 | +(1+2) | +2 | +0 | +0 | +2 | +2 | +2 | +0 | +0 | +1 | +4 | +1 | +0 | +5 |