A263392 Riesel numbers that have at least two covering sets.

66837283, 68026001, 71344361, 71604733, 74477159, 94270439, 97579567, 122606647, 140022313, 153196541, 170969579, 182720077, 198885523, 211327993, 220316413, 227116031, 280536071, 285155137, 290419777, 292202437, 293175191, 309240779, 324576431, 331006603

Offset: 1

Author

Arkadiusz Wesolowski, Oct 16 2015

Keywords

• nonn

Examples

			For every k >= 1, 97579567*2^k - 1 has a divisor in the set {3, 5, 7, 13, 17, 241} and also in the set {3, 5, 13, 17, 97, 241, 257}. 97579567 is therefore in the sequence.
		

Links

• Wikipedia, Riesel number

Crossrefs

Cf. A101036, A263391.

Extensions

1 term inserted by Arkadiusz Wesolowski, Aug 28 2016

More terms from Arkadiusz Wesolowski, Jan 09 2018