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A020287 Strong pseudoprimes to base 61. 1
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 (list; graph; refs; listen; history; text; internal format)
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: A201340 A051826 A081196 * A152272 A091644 A238538

Adjacent sequences:  A020284 A020285 A020286 * A020288 A020289 A020290

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified August 11 09:30 EDT 2020. Contains 336423 sequences. (Running on oeis4.)