## 33 Replies - 14315 Views - Last Post: 24 October 2013 - 02:21 PM

### #1

# How many?

Posted 04 June 2010 - 02:04 PM

If I use an algorithm that generates a serial that looks like #########-XX##

How many unique keys would this be able to create? Or would you need the algorithm?

How many unique keys would this be able to create? Or would you need the algorithm?

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**Replies To:** How many?

### #3

## Re: How many?

Posted 04 June 2010 - 02:14 PM

So that means you need the algorithm because it goes off their name?

### #4

## Re: How many?

Posted 04 June 2010 - 02:22 PM

assuming it is only from 9 digit numbers (for 1 to 9)

######### is 9^9 = 387 420 489

XX## is 9^4 = 6561 assuming all are digits only

i dont get it why 1?

######### is 9^9 = 387 420 489

XX## is 9^4 = 6561 assuming all are digits only

i dont get it why 1?

This post has been edited by **NoBrain**: 04 June 2010 - 02:22 PM

### #5

## Re: How many?

Posted 04 June 2010 - 02:25 PM

Reread what you initial wrote.

If the output for algorithm is #########-XX## there can only be one.

To work of the number of combination you need to tell us what the symbols represent.

**generates a serial that looks like #########-XX##**If the output for algorithm is #########-XX## there can only be one.

To work of the number of combination you need to tell us what the symbols represent.

### #6

## Re: How many?

Posted 04 June 2010 - 02:29 PM

NoBrain, on 04 June 2010 - 03:22 PM, said:

assuming it is only from 9 digit numbers (for 1 to 9)

######### is 9^9 = 387 420 489

XX## is 9^4 = 6561 assuming all are digits only

i dont get it why 1?

######### is 9^9 = 387 420 489

XX## is 9^4 = 6561 assuming all are digits only

i dont get it why 1?

HOLY CRAP! I didn't think I could make an algorithm that could do that!

*serials? Or am I wrong?*

**387427050**
This post has been edited by **AmuletOfNight**: 04 June 2010 - 02:35 PM

### #7

## Re: How many?

Posted 04 June 2010 - 02:32 PM

In other words

If you are using only digits (0-9) that's 10 possible values for each character.

if you have 5 characters: 10 * 10 * 10 * 10 * 10 = 10^5

If you only use digits 1-9 then you have 9 possible values for each character

9 * 9 * 9 * 9 = 9^5

If you are going to use all letters and all numbers (not considering upper and lower case differently) then you have 36 possible values for each character

36 * 36 * 36 * 36 = 36^5

And so on

If you are using only digits (0-9) that's 10 possible values for each character.

if you have 5 characters: 10 * 10 * 10 * 10 * 10 = 10^5

If you only use digits 1-9 then you have 9 possible values for each character

9 * 9 * 9 * 9 = 9^5

If you are going to use all letters and all numbers (not considering upper and lower case differently) then you have 36 possible values for each character

36 * 36 * 36 * 36 = 36^5

And so on

### #8

## Re: How many?

Posted 04 June 2010 - 02:32 PM

Just answer the follow three questions.

What does a # symbol represent?

What does a - symbol represent?

What does a X symbol represent?

What does a # symbol represent?

What does a - symbol represent?

What does a X symbol represent?

### #9

## Re: How many?

Posted 04 June 2010 - 02:34 PM

### #10

## Re: How many?

Posted 04 June 2010 - 02:37 PM

What numbers? And How Many?

What Letters? And How Many?

What Letters? And How Many?

### #11

## Re: How many?

Posted 04 June 2010 - 02:37 PM

now dude look at this tutorial:

http://www.dreaminco...1&#entry1013591

it may give you a start

http://www.dreaminco...1&#entry1013591

it may give you a start

This post has been edited by **NoBrain**: 04 June 2010 - 02:37 PM

### #12

## Re: How many?

Posted 04 June 2010 - 02:38 PM

A number or a letter. It's generating these letters off their name.

### #13

## Re: How many?

Posted 04 June 2010 - 02:41 PM

#########-XX##

then do the math

9^9 + 26^2 + 9^2

then do the math

9^9 + 26^2 + 9^2

### #14

## Re: How many?

Posted 04 June 2010 - 02:42 PM

So a number I could use -1.28

####-XX##

Where;

# represents a single digit from the set [0-9]

- is just a dash.

X represents a single letter from the set [A-Z]

Combinations = 10^6 * 26^2

Simple to do when have their definitions.

####-XX##

Where;

# represents a single digit from the set [0-9]

- is just a dash.

X represents a single letter from the set [A-Z]

Combinations = 10^6 * 26^2

Simple to do when have their definitions.