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Search: id:A059394
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| A059394 |
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Special safe primes (from A005385) such that the next prime is also a safe prime. |
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+0
1
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| 5, 7, 467, 1307, 2447, 5087, 5927, 12527, 18947, 44687, 55079, 78467, 79943, 83207, 93383, 103007, 105143, 111443, 118787, 128879, 143687, 164987, 196907, 204587, 207227, 208787, 229487, 232823, 236507, 257627, 267143, 275987, 289319, 296159
(list; graph; listen)
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OFFSET
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0,1
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EXAMPLE
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For {467,55079,103007,728579,887759,..} safe primes {479,55103,103043,728627,887819} are the next primes, whose differences are 12,24,36,48,60,.. respectively,not necessarily equal to 12, the possible minimum (see A059322).
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MATHEMATICA
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ss[x_] := PrimeQ[(Prime[x]-1)/2]&&PrimeQ[(Prime[x+1]-1)/2] t=Prime[Flatten[Position[Table[ss[w], {w, 1, 100000}], True]]]
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CROSSREFS
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Cf. A005385, A005384, A059322, A059323, A059327.
Adjacent sequences: A059391 A059392 A059393 this_sequence A059395 A059396 A059397
Sequence in context: A083842 A123536 A057177 this_sequence A114368 A020467 A089344
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Jan 29 2001
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