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Natural Logarithm of 10 Digits


The digits of the natural logarithm of 10 form its decimal expansion, beginning with

 ln10=2.302585092994045684...

(OEIS A002392). It was computed to 10^(11) decimal digits by S. Kondo on May 20, 2011 (Yee).

The Earls sequence (starting position of n copies of the digit n, counting only fractional digits) for ln10 is given for n=1, 2, ... by 20, 111, 56, 9041, 4767, 674596, 24611354, 64653957, 131278082, ... (OEIS A228243).

ln10-constant primes occur at 1, 2, 40, 242, 842, 1541, 75067, ... decimal digits (OEIS A228240).

The starting positions of the first occurrence of n=0, 1, ... in the decimal expansion of ln10 (including the initial 2 and counting it as the first digit) are 3, 21, 1, 2, 13, 5, 17, 22, ... (OEIS A229197).

Scanning the decimal expansion of ln10, including the initial 2, until all n-digit strings have occurred, including those with leading zeros, the last strings of lengths 1, 2, ... are 7, 38, 351, 8493, 33058, 362945, ... (OEIS A229126). They end at positions 22, 701, 7486, 88092, 1189434, 13426407, ... (OEIS A229124).

The digit string 0123456789 first occurs starting at position 3349545080, but 9876543210 does not occur in the first 10^(10) decimal digits of ln10 (E. Weisstein, Aug. 27, 2013).

It is not known if ln10 is normal, but the following table giving the counts of digits in the first 10^n fractional digits shows that these digits are very uniformly distributed up to at least 10^(10).

d\nOEIS1010010^310^410^510^610^710^810^910^(10)
021410396499799988710003569996731999878421000052045
1058210391008810042999834099992451000080601000031412
221110610089943999271000879100051331000139391000008327
3188110451010810016699932910001639100010112999996738
40910697310006100210998402999994899988853999996641
529103967996199375100138110000670100011829999956649
6091079679828997699994891000118299972292999972639
7011110100710061997821000327999962399989099999983529
81101061000998710063310018129998524100004534999974468
9214961030100399982299968599973051000134401000027552

See also

Constant Digit Scanning, Constant Primes, Natural Logarithm of 10, Natural Logarithm of 10 Continued Fraction

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References

Sloane, N. J. A. Sequences A002392/M0394, A228240, A228243, A229124, A229126, and A229197 in "The On-Line Encyclopedia of Integer Sequences."Yee, A. J. "y-cruncher - A Multi-Threaded Pi-Program." https://www.numberworld.org/y-cruncher/.

Referenced on Wolfram|Alpha

Natural Logarithm of 10 Digits

Cite this as:

Weisstein, Eric W. "Natural Logarithm of 10 Digits." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/NaturalLogarithmof10Digits.html

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