A077498 Primes of the form 2^r*7^s + 1.

2, 3, 5, 17, 29, 113, 197, 257, 449, 1373, 3137, 50177, 65537, 114689, 268913, 470597, 614657, 1075649, 3294173, 7340033, 9834497, 210827009, 275365889, 359661569, 469762049, 1129900997, 1438646273, 1927561217, 7909306973, 52613349377

Offset: 1

Author

Amarnath Murthy, Nov 07 2002

Keywords

• nonn

Examples

			197 = 2^2*7^2 + 1 is a member.
		

Crossrefs

Cf. A005109, A077497, A077499, A077500.

Extensions

Corrected and extended by Ray Chandler, Aug 02 2003