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A089825 Smallest n such that the least witness function W(n) = m, as m runs through the values in A089105. 2
9, 2047, 1373653, 134670080641, 25326001, 307768373641, 3215031751, 1502401849747176241, 2152302898747, 1478868544880821, 3034679039109989281, 3474749660383 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The least witness of 3825123056546413051 is 37, and no smaller number has 37 as its least witness. [Charles R Greathouse IV, Aug 14 2010]

REFERENCES

R. Crandall and C. Pomerance, Prime Numbers: A Computational Perspective, Springer, NY, 2001; see p. 157 (p. 168 in the second printing).

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Comment from Don Reble, May 27 2014: The sequence begins:

2 9

3 2047

5 1373653

6 134670080641

7 25326001

10 307768373641

11 3215031751

12 1502401849747176241

13 2152302898747

14 1478868544880821

15 3034679039109989281

17 3474749660383

18 ?

19 4498414682539051

20 ?

21 ?

22 16043083915816662841

23 341550071728321

CROSSREFS

Cf. A089105.

Sequence in context: A039917 A162140 A006945 * A173281 A004820 A162091

Adjacent sequences:  A089822 A089823 A089824 * A089826 A089827 A089828

KEYWORD

nonn,hard,more

AUTHOR

N. J. A. Sloane, Jan 18 2004

EXTENSIONS

a(8)-a(13) from Charles R Greathouse IV, Aug 14 2010

Corrected by Don Reble, May 27 2014

STATUS

approved

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Last modified November 18 09:21 EST 2017. Contains 294879 sequences.