The first 144 digits of pi add up to 666.
(Learned it a few years ago, but I thought it was cool)
Anyway, after studying pi from mid-March (I knew 145 digits) to late April (I knew 500 digits), I finally added 4 digits so the number I knew would be divisible by 6. (Now it's 504.)
Anyway, here's the first 144 digits of pi and a TI-BASIC program to fact-check me with:
3.14 159 26 535 897 932 3846 264 3383 279 502 884 197 1693 99 37510 58209 74944 5 92307 816 406 286 208 9986 2803 482 53421 1706 798 21480 865132 8230 6647 0938 4460 95505 8223 1725 359
{3,1,4,1,5,9,2,6,5,3,5,8,9,7,9,3,2,3,8,4,6,2,6,4,3,3,8,3,2,7,9,5,0,2,8,8,4,1,9,7,1,6,9,3,9,9,3,7,5,1,0,5,8,2,0,9,7,4,9,4,4,5,9,2,3,0,7,8,1,6,4,0,6,2,8,6,2,8,0,3,4,8,2,5,3,4,2,1,1,7,0,6,7,9,8,2,1,4,8,0,8,6,5,1,3,2,8,2,3,0,6,6,4,7,0,9,3,8,4,4,6,0,9,5,5,0,5,8,2,2,3,1,7,2,5,3,5,9→L₁
Disp sum(L₁
If I made a mistake somewhere, you should just ckeck out the internet, I got the original fact from
three
.onefouronefive
.net.