Fibonad

The Fibonad, coined by SuperJedi224, is equal to the 500th term in the fibonacci sequence (D being the roman numeral for 500), starting from the first one.

Its full decimal expansion is 139,423,224,561,697,880,139,724,382,870,407,283,950,070,256,587,697,307,264,108,962,948,325,571,622,863,290,691,557,658,876,222,521,294,125.

Source: [1]