1 10
2 11
3 95
4 39
5 77
6 679
7 6788
8 68889
9 2677889
10 26888999
11 3778888999
10 277777788888899
Notice the strange abundance of 8s and 9s. Incredible. Why so many 8s and 9s in a row? l can see you wondering what number has a persistence of 12. No one knows! We do know that there is no number less than 10^50 that has a persistence greater than 11. Neil Sloane conjectures that there is a number N such that no number has a persistence greater than N. It is conjectured that the largest number lacking the digit 1 with persistence 11 is 77,777,733,332,222,222,222,222,222,222.
2 11
3 95
4 39
5 77
6 679
7 6788
8 68889
9 2677889
10 26888999
11 3778888999
10 277777788888899
Notice the strange abundance of 8s and 9s. Incredible. Why so many 8s and 9s in a row? l can see you wondering what number has a persistence of 12. No one knows! We do know that there is no number less than 10^50 that has a persistence greater than 11. Neil Sloane conjectures that there is a number N such that no number has a persistence greater than N. It is conjectured that the largest number lacking the digit 1 with persistence 11 is 77,777,733,332,222,222,222,222,222,222.