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 2021-08-20, 15:09 #67 firejuggler     "Vincent" Apr 2010 Over the rainbow 5×569 Posts finding a certain specific chain of digit in the decimal part of pi. but can't remember wich
2021-08-21, 12:16   #68
LaurV
Romulan Interpreter

"name field"
Jun 2011
Thailand

100110111101012 Posts

Quote:
 Originally Posted by Viliam Furik What is a(20)?

2021-08-21, 13:03   #69
Dr Sardonicus

Feb 2017
Nowhere

2·2,917 Posts

Quote:
 Originally Posted by LaurV See this thread.
Ah, yes, the "primes in π" thread.

Since a(n) is standard notation for OEIS sequences, I had tried such sequences related to digits of pi.

The Wolfram Mathworld page on Pi Digits lists URLs of the the OEIS sequences a(n) for first occurrence of n consecutive decimal digits d, d = 0 to 9, in the decimal expansion of pi.

The largest value of n in any of these, however, is n = 14, for d = 0, 5, 7, and 9. These are in the first 1.21 x 1013 digits.

I suppose there might be a small chance of finding a(15) in one of these sequences among the first 6.28 x 1013 digits.

 2022-06-14, 06:19 #70 pinhodecarlos     "Carlos Pinho" Oct 2011 Milton Keynes, UK 13B316 Posts https://cloud.google.com/blog/produc...n-google-cloud "Records are made to be broken. In 2019, we calculated 31.4 trillion digits of π — a world record at the time. Then, in 2021, scientists at the University of Applied Sciences of the Grisons calculated another 31.4 trillion digits of the constant, bringing the total up to 62.8 trillion decimal places. Today we're announcing yet another record: 100 trillion digits of π." Last fiddled with by pinhodecarlos on 2022-06-14 at 06:20
2022-06-17, 22:30   #71
mrk74

Jan 2020

73 Posts

Quote:
 Originally Posted by pinhodecarlos https://cloud.google.com/blog/produc...n-google-cloud "Records are made to be broken. In 2019, we calculated 31.4 trillion digits of π — a world record at the time. Then, in 2021, scientists at the University of Applied Sciences of the Grisons calculated another 31.4 trillion digits of the constant, bringing the total up to 62.8 trillion decimal places. Today we're announcing yet another record: 100 trillion digits of π."

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