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Search: id:A067845
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| A067845 |
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Largest n-digit pseudoprime (in base 2). |
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+0
4
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| 645, 8911, 93961, 997633, 9995671, 99971821, 999828727, 9999109081, 99983971501, 999986341201, 9999946514845, 99999856404001, 999994510007533, 9999999191658001
(list; graph; listen)
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OFFSET
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3,1
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LINKS
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Patrick De Geest, Smallest n-digit Pseudoprimes
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EXAMPLE
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a(2)=8911, so largest pseudoprime (base 2) of 4 digits is 8911.
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CROSSREFS
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Cf. A062568, A062852.
Cf. A001567, A068216, A001262, A062568, A062852.
Sequence in context: A100873 A129927 A063844 this_sequence A057942 A046020 A108821
Adjacent sequences: A067842 A067843 A067844 this_sequence A067846 A067847 A067848
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KEYWORD
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hard,more,nonn
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AUTHOR
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Shyam Sunder Gupta (guptass(AT)rediffmail.com), Feb 14 2002
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EXTENSIONS
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More terms from Farideh Firoozbakht (mymontain(AT)yahoo.com), Jan 11 2007
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