Question

Ever notice how there are practically no nines in pi? it's true. what's the longest continuous sequence not containing a nine in the first million digits? (i want the sequence itself.)

Answer 1

Not sure if it is a school problem, but it is of interest to find the answer.

WithIn the first million digits of Pi, there are

5118-9 's

794-99 sequences

79-999 sequences

6-9999 sequences

2-99999 sequences

1-999999 sequence

Feel free to check the accuracy of above counts.

The 6-digit sequence starts at the 762th digit after the decimal point.

Digits of Pi including the first 800 digits after the decimal are included below:

3.14159265358979323846264338327950288419716939937510582097494459230781640628620899862803482534211706798214808651328230664709384460955058223172535940812848111745028410270193852110555964462294895493038196442881097566593344612847564823378678316527120190914564856692346034861045432664821339360726024914127372458700660631558817488152092096282925409171536436789259036001133053054882046652138414695194151160943305727036575959195309218611738193261179310511854807446237996274956735188575272489122793818301194912983367336244065664308602139494639522473719070217986094370277053921717629317675238467481846766940513200056812714526356082778577134275778960917363717872146844090122495343014654958537105079227968925892354201995611212902196086403441815981362977477130996051870721134999999837297804995105973173281609631859