Maths matters :: Cracking numbers equal cracking codes  
         
     

To crack a code on the Internet, all you have to do is to find a way to solve the following problem: every time you visit a website like amazon.com, your computer receives a code number N. To crack the code number you must find two prime numbers p and q which multiplied together give you N.

Here are some codes to crack:
15 = p x q

126619= p x q

31074182404900437213507500358885679300373460228427
27545720161948823206440518081504556346829671723286
78243791627283803341547107310850191954852900733772
4822783525742386454014691736602477652346609= p x q

If you can do the last one, you will win $20,000. Click here to find out more

How does an internet site use primes to encode credit cards?
 
         

 

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