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A067845 Largest n-digit pseudoprime (in base 2). 7
645, 8911, 93961, 997633, 9995671, 99971821, 999828727, 9999109081, 99983971501, 999986341201, 9999946514845, 99999856404001, 999994510007533, 9999999191658001 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..16.

Patrick De Geest, Smallest n-digit Pseudoprimes

Index entries for sequences related to pseudoprimes

EXAMPLE

a(2)=8911, so largest pseudoprime (base 2) of 4 digits is 8911.

CROSSREFS

Cf. A001567, A068216, A001262, A062568, A062852.

Sequence in context: A216364 A063844 A265684 * A057942 A230488 A228575

Adjacent sequences:  A067842 A067843 A067844 * A067846 A067847 A067848

KEYWORD

hard,more,nonn,base

AUTHOR

Shyam Sunder Gupta, Feb 14 2002

EXTENSIONS

More terms from Farideh Firoozbakht, Jan 11 2007

STATUS

approved

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Last modified September 26 05:09 EDT 2017. Contains 292502 sequences.