Earlier quoted context omitted.
True. However some achievements will last after I am dead, some will not. I'm more interested in the former.
If you die sooner your achievements won't have to last for so long to qualify. (Though that's probably not what you want.) I guess your best stab at achieving immortality in your works is mathematics.
Who cares if all memory of me is erased in 300 years. Hopefully I will have helped to advance some technology in that time.