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A062568
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Smallest n-digit strong pseudoprimes (in base 2).
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9
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2047, 15841, 104653, 1004653, 10323769, 100463443, 1002261781, 10000321321, 100004790097, 1000002977551, 10000130243671, 100002236680837, 1000003918690669, 10000008250001701, 100000150553089531, 1000000274500018837, 10000003599249373469
(list; graph; refs; listen; history; internal format)
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OFFSET
| 4,1
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LINKS
| Patrick De Geest, Smallest n-digit pseudoprimes (base 2)
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EXAMPLE
| a(1)=2047 because 2047 is the smallest 4-digit strong pseudoprime to base 2.
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CROSSREFS
| Cf. A001567, A068216, A067845, A001262, A062852.
Sequence in context: A038462 A001262 A141232 * A180065 A075954 A011561
Adjacent sequences: A062565 A062566 A062567 * A062569 A062570 A062571
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KEYWORD
| hard,base,nonn
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AUTHOR
| Shyam Sunder Gupta (guptass(AT)rediffmail.com), Feb 13 2002
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EXTENSIONS
| Edited by Charles R Greathouse IV (charles.greathouse(AT)case.edu), Nov 01 2009
a(17)-a(20) from Charles R Greathouse IV, Mar 14, 2011
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