so long as the end sum remains 3 digits long it will,but at some point as you keep adding to the figure the end total will be at least 4 digits long..ie 1000 or more.since you can't start with a number higher than 9 then the first two digits won't match the original number you thought of..[won't matter,we'll be long gone by then].but the last two numbers should [i think!!] still corrispond with whatever the last two digits of your age happen to be in that year...so yeah,it should be good for at least a few more 100 years. edit...wait,i'm starting to have second thought's on this.. .,no,i think i'm right....getting a headache...time to bail!!!