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A230484
Strong pseudoprimes (base 2) that become prime when two is added.
4
253241, 280601, 580337, 1207361, 1678541, 1909001, 2419385, 5173601, 16324001, 18073817, 22849481, 25080101, 43363601, 60155201, 67194401, 82870517, 85519337, 97924217, 100943201, 102004421, 104857391, 116090081, 128987429, 134696801, 135969401, 145348529
OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000 (terms 1..5001 from Shyam Sunder Gupta)
EXAMPLE
253241 is a strong pseudoprime (base 2) and 253243 is prime.
CROSSREFS
KEYWORD
nonn
AUTHOR
Shyam Sunder Gupta, Oct 20 2013
STATUS
approved