A230484 Strong pseudoprimes (base 2) that become prime when two is added.

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

Author

Shyam Sunder Gupta, Oct 20 2013

Keywords

• nonn

Examples

			253241 is a strong pseudoprime (base 2) and 253243 is prime.
		

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000 (terms 1..5001 from Shyam Sunder Gupta)

Crossrefs

Cf. A001262, A230483, A230485, A230487.