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A139536 Smallest prime starting with 1 and followed by a string of n 0's. 2
101, 1009, 10007, 100003, 1000003, 100000037, 100000007, 1000000007, 100000000019, 100000000003, 10000000000037, 100000000000031, 1000000000000037, 10000000000000061, 100000000000000013 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Not the same as A139535 though most entries match. (First dissimilarity occurs for n=19: A139535(19)=1000000000000000000409; A139536(19)=10000000000000000000139.)

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..997

MATHEMATICA

Table[Module[{k=1}, While[CompositeQ[10^IntegerLength[k] FromDigits[ PadRight[ {1}, n, 0]]+k], k+=2]; 10^IntegerLength[k] FromDigits[ PadRight[ {1}, n, 0]]+k], {n, 2, 20}] (* Harvey P. Dale, Aug 07 2021 *)

CROSSREFS

Sequence in context: A082276 A069597 A139535 * A115820 A115773 A115818

Adjacent sequences:  A139533 A139534 A139535 * A139537 A139538 A139539

KEYWORD

nonn,base

AUTHOR

Lekraj Beedassy, Apr 25 2008

STATUS

approved

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Last modified May 24 18:27 EDT 2022. Contains 354043 sequences. (Running on oeis4.)