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A230485 Strong pseudoprimes n to base 2 such that n-2 and n+2 are primes. 3
3465253618401, 44202753561285411, 1640293473202755801, 10623546148468360251 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
For all n, a(n)-2 is in A230810. - M. F. Hasler, Dec 08 2016
LINKS
EXAMPLE
3465253618401 is a strong pseudoprime (base 2) and 3465253618399 and 3465253618403 are primes.
CROSSREFS
Sequence in context: A179649 A080123 A209834 * A172646 A222558 A290504
KEYWORD
nonn,more,hard
AUTHOR
Shyam Sunder Gupta, Oct 20 2013
STATUS
approved

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Last modified May 29 13:10 EDT 2024. Contains 372940 sequences. (Running on oeis4.)