I was told that you can determine the private key of an RSA encryption with the public key.
I thought the point of a public key was to avoid letting people find the private key, but anyway, they said I could find it by simply factoring the public key modulus? Were they joshing me or can it be done? If so, how would I do that (need to acquire $p,q$ somehow?)?
So with with example Public Key $( e, n ) = ( 13, 119 )$ or any other valid key you want to use...