A230483 Strong pseudoprimes (base 2) that become prime when two is subtracted.

4681, 29341, 42799, 49141, 52633, 85489, 90751, 104653, 458989, 1004653, 1082401, 1251949, 1302451, 1907851, 2510569, 2811271, 3090091, 3539101, 5044033, 5049001, 5489641, 5590621, 7177105, 9069229, 9073513, 9567673, 9995671, 10323769, 11473885, 12263131

Offset: 1

Author

Shyam Sunder Gupta, Oct 20 2013

Keywords

• nonn

Examples

			4681 is a strong pseudoprime (base 2) and 4679 is prime.
		

Links

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

Crossrefs

Cf. A001567, A001262, A230484, A230485, A230487.