Hello I can't quite seem how to finish this problem:

The number 3750 satisfies f(3750) = 1000. Find a numberthat has the following three properties:a

(i)º 7^3003 (mod 3750).a

(ii) 1<a<5000.

(iii)is not divisible by 7.a

THANKS!!!

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- February 2nd 2009, 09:37 PMycsanchezCongruences, Powers, and Euler's Formula
Hello I can't quite seem how to finish this problem:

The number 3750 satisfies f(3750) = 1000. Find a numberthat has the following three properties:**a**

(i)º 7^3003 (mod 3750).**a**

(ii) 1__<__**a**__<__5000.

(iii)is not divisible by 7.**a**

THANKS!!!

- February 3rd 2009, 02:20 AMSimonM

However, (if gcd(n,a) = 1) - February 23rd 2010, 03:10 PMroflzx
Can someone expand on this?

Thanks. - February 23rd 2010, 07:26 PMBacterius
Note that (it can be shown quite trivially using Euler's Generalization, with ).

Such a number does not exist, since if , then , and we have a contradiction.