Take the *decimal* expansion of A,B, and then reinterpret each decimal digit as a *hexadecimal* digit. Call these new numbers A', B'. Finally, concatenate A':a:B', where 'a' is the hex digit for 5+5. The receiver inverts the process after scanning hex digits looking for 'a'. Of course, you can get a more compact representation by using base-eleven instead of base-16. -- Google 'BCD'='Binary Coded Decimal'; compliments to IBM 1620, 1401, system/360, Intel 4004, ... At 10:30 AM 3/10/2020, Ãric Angelini wrote:
Hello Math-Fun,
I would like to transmit two _composite_ numbers A and B in the form of single number C.
How can I do that?
For instance, if Alice concatenates A et B, Bob will have a problem in reconstructing those numbers out of C:
A = 865445 B = 12377007 C = 86544512377007
Is there a clever, economic way to say where C must be split?
Or do you know another technique (dealing perhaps with prime numbers)?
This has nothing to do with cryptography (I guess) -- just a (silly) question.
Best, Ã.