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A180065 Smallest strong pseudoprime to base 2 with n prime factors. 0
2047, 15841, 800605, 293609485, 10761055201, 5478598723585, 713808066913201, 90614118359482705, 5993318051893040401 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..10.

Index entries for sequences related to pseudoprimes

EXAMPLE

800605 is the third term because 800605 = 5 * 13 * 109 * 113, more prime factors than smaller 2-strong pseudoprimes.

CROSSREFS

Cf. A007011, A001262.

Sequence in context: A001262 A141232 A062568 * A270697 A075954 A011561

Adjacent sequences:  A180062 A180063 A180064 * A180066 A180067 A180068

KEYWORD

nonn

AUTHOR

Kevin Batista (kevin762401(AT)yahoo.com), Aug 09 2010

EXTENSIONS

a(6)-a(10) and editing from Charles R Greathouse IV, Aug 29 2010

STATUS

approved

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Last modified September 21 00:17 EDT 2019. Contains 327252 sequences. (Running on oeis4.)