in 1998, i made a C++ program to calculate pi to a billion digits. i coded it on my laptop (pentium 2 i think) and then ran the program. the next day i got a new laptop but decided to keep the program running. it's been over seven years now since i ran it. and this morning it finished calculating. the output:       "THE VALUE OF PI TO THE BILLIONTH DIGIT IS = " mindblowing eh? i looked in the code of my program, and i found out that i forgot to output the value :(.