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A263392 Riesel numbers that have at least two covering sets. 2
66837283, 68026001, 71344361, 71604733, 74477159, 94270439, 97579567, 122606647, 140022313, 153196541, 170969579, 182720077, 198885523, 211327993, 220316413, 227116031, 280536071, 285155137, 290419777, 292202437, 293175191, 309240779, 324576431, 331006603 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Wikipedia, Riesel number
EXAMPLE
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.
CROSSREFS
Sequence in context: A184215 A151697 A138085 * A011576 A089081 A161774
KEYWORD
nonn
AUTHOR
EXTENSIONS
1 term inserted by Arkadiusz Wesolowski, Aug 28 2016
More terms from Arkadiusz Wesolowski, Jan 09 2018
STATUS
approved

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)