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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
Table of n, a(n) for n=1..4.
EXAMPLE
3465253618401 is a strong pseudoprime (base 2) and 3465253618399 and 3465253618403 are primes.
CROSSREFS
Cf. A001567, A057942, A001262, A230483, A230484.
Sequence in context: A179649 A080123 A209834 * A172646 A222558 A290504
Adjacent sequences: A230482 A230483 A230484 * A230486 A230487 A230488
KEYWORD
nonn,more,hard
AUTHOR
Shyam Sunder Gupta, Oct 20 2013
STATUS
approved

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Last modified November 16 05:03 EST 2024. Contains 377779 sequences.
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