To be a technically valid mastercardtwo things would have to change about that number.
1. the first 2 digits would have to be in the range of 51-55
2. the last digit (if still using the 12 at the start) would have to be 8.
The right-most digit is a check-digit.
To work out if a card is valid you do the following:
Working from the second from the right you double every other number (so 2, 1, 0 etc). If the doubled number is 10 or higher, then you add the two digits together (1+0 = 1).
Once you have done this, you add the doubled numbers to the remaining (undoubled) numbers (including the check-digit) and the answer must end with a zero. If it doesn't, the card number isn't valid.
I'm bored at work, as you may be able to tell.
Not that this detracts from your picture at all :P
(1. the first 2 digits would have to be in the range of 51-55
2. the last digit (if still using the 12 at the start) would have to be 8.
The right-most digit is a check-digit.
To work out if a card is valid you do the following:
Working from the second from the right you double every other number (so 2, 1, 0 etc). If the doubled number is 10 or higher, then you add the two digits together (1+0 = 1).
Once you have done this, you add the doubled numbers to the remaining (undoubled) numbers (including the check-digit) and the answer must end with a zero. If it doesn't, the card number isn't valid.
I'm bored at work, as you may be able to tell.
Not that this detracts from your picture at all :P
Quijibo Esq. BSc. May contain traces of nuts,
Mon 17 Aug 2009, 15:31,
archived)
I know.I'm just in FACT OF THE DAY™ mode.
( Quijibo Esq. BSc. May contain traces of nuts,
Mon 17 Aug 2009, 15:39,
archived)
it was very interestingI have learned something today. If I had been aware of such details, I would most likely have attempted to make it a valid number... but then I thought it would be easier to just go for the standard sample-version charge card format, to avoid using any particular names.
( drbroon abloooobloobloo,
Mon 17 Aug 2009, 15:42,
archived)