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Problem: Find two prime numbers that, when multiplied, produce a 400 digit number.

...Has anyone even seen a 400 digit number? What would you call that number? Anyways its obvious that you would have to work with scientific notation, but I dunno what forrmula/strategy to even try...

BTW, I posted this question under computer security and under math because I know this deals with the basics of computer encryption. This is actually a course in my I.S.S. program...

2006-10-28 11:31:23 · 2 answers · asked by ? 4 in Computers & Internet Security

Ok, you first two are both wrong. F100, it is not "find a 400 digit prime number"; reread the question please. Shooey, as for you, a prime number is not defined as a number with only two factors; it is a number that is only divisible by 1 and it-self,(and yes, that includes one).

2006-10-29 13:37:16 · update #1

2 answers

I don't know where to even start. The above answer is incorrect though, a prime number is a number with only 2 factors, the number one has only 1 factor, so one is not prime.

And prime numbers can end with a 9 BTW

2006-10-29 08:11:31 · answer #1 · answered by Anonymous · 0 1

Find a 400 digit prime number. (divideable by itself and 1)
That is the simple answer since 1 IS a prime number!!
(Hint: it will be an odd number NOT ending in 5 or 9)

2006-10-28 20:15:37 · answer #2 · answered by f100_supersabre 7 · 0 2

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