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Search: id:A062568
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| A062568 |
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Smallest n-digit strong pseudoprimes (in base 2). |
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+0
6
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| 2047, 15841, 104653, 1004653, 10323769, 100463443, 1002261781, 10000321321, 100004790097, 1000002977551, 10000130243671, 100002236680837, 1000003918690669
(list; graph; listen)
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OFFSET
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4,1
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LINKS
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Patrick De Geest, Smallest n-digit pseudoprimes(base 2)
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EXAMPLE
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a(1)=2047, So 2047 is the smallest strong pseudoprime of 4 digit length.
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CROSSREFS
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Cf. A001567, A068216, A067845, A001262, A062852.
Sequence in context: A038462 A001262 A141232 this_sequence A075954 A011561 A038998
Adjacent sequences: A062565 A062566 A062567 this_sequence A062569 A062570 A062571
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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 13 2002
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