ID number 15-digit + 18-bit rule

ID number 15-digit + 18-digit calculation method:

> Original ID card is 15-bit      
> The first step is to insert 19      after the sixth digit of the original 15-bit ID card;
> This ID number is 17-bit      
>     
> Each digit is multiplied by its corresponding factor      &NBSP
> Coefficient table:      
> Digit 1 2 3 4 5 6 7 8 9 > Multipliers 7 9 5 8 4 2 1 6 3 7 9 5 8 4 2     
> Add the results after multiplication and then >  &nbs to 11
P; &NBSP
> Get a 0-10 digital mantissa       
> mantissa corresponding table:     &NBSP
>0   1   2   3   4   5   6   7    8   9   10     
>1   0   X    9   8   7   6   5   4   3   2     &NBSP
>   
> So you get your 18-digit ID number

For example, the original 15-digit ID number is: 310112850409522

1.310112850409522--> 310112 + 850409522--> 31011219850409522
2.3*7+1*9+0*10+1*5+1*8+2*4+1*2+9*1+8*6+5*3+0*7+4*9+0*10+9*5+5*8+2*4+2*2 = 258
3.258 Mod 11 = 5
4.5--> 7
5.31011219850409522 + 7--> 310112198504095227

Therefore, after the upgrade, the new 18-digit ID number is: 310112198504095227