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A069664 Largest n-digit prime with minimum digit sum. 10
2, 11, 101, 3001, 21001, 102001, 2100001, 30000001, 200001001, 2010000001, 30000000001, 110000000101, 2000001000001, 20000000100001, 200000010000001, 1100010000000001, 20000001000000001, 110000000000000101, 2000000000000100001, 20000000100000000001 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Joel B. Lewis and T. D. Noe, Table of n, a(n) for n = 1..100

MATHEMATICA

Table[ Max[ Flatten[Table[ If[PrimeQ[10^n + 1], 10^n + 1, If[PrimeQ[10^n + 10^i + 10^j + 1], 10^n + 10^i + 10^j + 1, 0]], {i, 0, n}, {j, 0, i}]]], {n, 1, 50}] (Program works so long as there exists an n-digit prime with digit sum 4 or less).

CROSSREFS

Cf. A069661, A069662, A069663.

Sequence in context: A121419 A099701 A089393 * A130150 A115941 A024721

Adjacent sequences:  A069661 A069662 A069663 * A069665 A069666 A069667

KEYWORD

nonn,base

AUTHOR

Amarnath Murthy, Apr 05 2002

EXTENSIONS

a(7) - a(12) from Tom Mueller (muel4503(AT)uni-trier.de), Apr 28 2004

a(13) and onwards added by Joel B. Lewis, Jan 07 2008

STATUS

approved

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Last modified June 29 03:09 EDT 2017. Contains 288858 sequences.