A020287 - OEIS

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A020287

Strong pseudoprimes to base 61.

15, 217, 341, 1261, 2701, 3661, 6541, 6697, 7613, 13213, 16213, 22177, 23653, 23959, 31417, 50117, 61777, 63139, 67721, 76301, 77421, 79381, 80041, 102341, 113491, 115231, 145993, 160147, 163073, 164737, 170941, 178709, 197209, 210817, 249631

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OFFSET

1,1

COMMENTS

The smallest number which is a strong pseudoprime to the bases 2 (A001262), 7 (A020233) and also 61 (here) is 4759123141 [Jaeschke]. - R. J. Mathar, Apr 05 2011

LINKS

R. J. Mathar, Table of n, a(n) for n = 1..202

G. Jaeschke, On strong pseudoprimes to several bases, Mathematics of Computation, 61 (1993), 915-926.

Index entries for sequences related to pseudoprimes

CROSSREFS

Sequence in context: A051826 A351515 A081196 * A152272 A091644 A238538

Adjacent sequences: A020284 A020285 A020286 * A020288 A020289 A020290

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved