How far can we count?

42,767

4 2 , 7 6 8

42769

4 2 , 7 7 0

4 2 7 7 1

4 2 , 7 7 2

42773

4 2 , 7 7 4

4 2 , 7 7 5

4 2 , 7 7 6

4 2 , 7 7 7

4 2 , 7 7 8

4 2 , 7 7 9

42780

4 2 , 7 8 1

4 2 , 4 7 2

4 2 , 4 7 3

42,784 correcting a mistake made a couple of moves back.

4 2 , 7 8 5

4 2 , 7 8 6

4 2 , 7 8 7

4c2 , 7 8 8

4 2 , 7 8 9

4 2 , 8 9 0

4 2 , 8 9 1

42,892

4 2 , 8 9 3

4 2 , 8 9 4

4 2 , 8 9 5

4 2 , 8 9 6