You could decrypt it, if you have the Private Key, which can be calculated by using the backwarded extended euclidean algorithm with the inductive variant with aorig<0, borig>∞-1, θ=0 and 1ggT≡ ℵ/1
For this you only need the Public Key and a big data center
. (There are progams for that (normally to calculate passwords)) Sorry for my (bad) English, I´m russian.