OFFSET
0,1
COMMENTS
The largest known prime as of Jan 07 2016 is 2^74207281 - 1. The number itself contains 22,338,618 digits; all integers with fewer than 7 digits are contained within M74207281. The first number not contained in M74207281 is 1000003, so this sequence stops at a(1000002) = 1505496.
LINKS
Michael P. Tilley, Table of n, a(n) for n = 0..9999
Brady Haran and Matt Parker, More details about the World's Biggest Prime (2016).
Michael P. Tilley, A larger file of the sequence for n= 0 - 1000002
EXAMPLE
The first few digits of M74207281 are 30037641808460618205298609835916605...
Starting with three as the first digit count the position of n from the beginning
0 is the second digit,
1 is the eighth digit,
2 18,
3 1,
4 7,
etc.
MATHEMATICA
With[{m = IntegerDigits[2^74207281 - 1]}, Array[SequencePosition[m, IntegerDigits[#], 1][[1, 1]] &, 100, 0]] (* Paolo Xausa, Apr 07 2024 *)
CROSSREFS
KEYWORD
nonn,base,fini
AUTHOR
Michael P. Tilley, Jan 25 2016
STATUS
approved