What is the formula for calculating ID card verification code?

The verification code is an important basis for identifying whether an ID number actually exists. So how do we use the check code to determine whether an ID number is authentic?

How does the verification code determine the authenticity of the ID number? Let’s take a look at the specific planning process.

Step 1: Multiply the first digit of the ID number by 7; multiply the second digit of the ID number by 9; Multiply the 3rd digit of the ID number by 10; multiply the 4th digit of the ID number by 5; multiply the 5th digit of the ID number by 8; multiply the 6th digit of the ID number by 4 Multiply; multiply the 7th digit of the ID number by 2; multiply the 8th digit of the ID number by 1; multiply the 9th digit of the ID number by 6; multiply the 9th digit of the ID number by 6; Multiply the 10th digit by 3; multiply the 11th digit of the ID number by 7; multiply the 12th digit of the ID number by 9; multiply the 13th digit of the ID number by 10 ; Multiply the 14th digit of the ID number by 5; Multiply the 15th digit of the ID number by 8; Multiply the 16th digit of the ID number by 4; Multiply the 17th digit of the ID number. The digit number is multiplied by 2.

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Step 2: Sum the results of multiplying 1 to 17 digits of the ID number in the first step and add them all up .

Step 3: Divide the result calculated in the second step by 11, so that the remainder is 0, the remainder is 1, the remainder is 2, the remainder is 3, the remainder is 4, the remainder is 5, The remainder is 6, the remainder is 7, the remainder is 8, the remainder is 9, the remainder is 10, a total of 11 possibilities.

Step 4: If the remainder is 0, the corresponding number of the last ID card is 1; if the remainder is 1, the corresponding number of the last ID card is 0; if the remainder is 2 , the corresponding number of the last ID card is X; if the remainder is 3, the number of the corresponding last ID card is 9; if the remainder is 4, the number of the corresponding last ID card is 8; If the remainder is 5, then the corresponding number of the last ID card is 7; if the remainder is 6, then the number of the corresponding last ID card is 6; if the remainder is 7, then the number of the corresponding last ID card is 7 The number is 5; if the remainder is 8, then the corresponding number of the last ID card is 4; if the remainder is 9, then the corresponding number of the last ID card is 3; if the remainder is 10, then the corresponding number of the last ID card is 3 The ID card number is 2.

For example: ID number 432831196411150810 Is this ID card a valid ID number? Please see the verification code analysis.

The check code is 0, and the last digit in the ID number 432831196411150810 is 0, so this is a valid ID number.

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