I understand that if black holes were created in the LHC, they should evaporate in 10^-100 seconds and be created at 1 black hole per second. The collider produces 10^8 collisions per second. The lifespan of a black hole increases with mass^3. I was wondering whether it would be possible for a small black hole to be 'pumped up' with additional collisions until it had a much longer lifespan. I realize that the likelihood of the first collision happening at all would be something on the order of 10^-92, and the increased charge of the black hole would make it less likely for another ion to bump into it..