Mastodawn

My brain's not working.

Is the multiplicative inverse of 1 modulo n always 1, and nothing else?

Of course 1*1=1 ... but I'm doubting myself and wondering if modulo arithmetic opens other possibilities.

@rzeta0 yes. Suppose x is a multiplicative inverse of 1, that is x*1=1. But 1 is the identity so x*1=x. Thus, x=1.

thanks, this is reassuring !