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Search: id:A090153
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| A090153 |
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Primes of the form identical digits preceded by a 5. |
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+0
2
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| 5, 53, 59, 577, 599, 5333, 59999, 511111, 599999, 59999999, 577777777, 59999999999, 5111111111111, 53333333333333, 59999999999999, 577777777777777, 5111111111111111, 577777777777777777
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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Select[ FromDigits /@ Flatten[ Table[ PadRight[{5}, i, # ] & /@ {1, 2, 3, 4, 5, 6, 7, 8, 9}, {i, 2, 24}], 1], PrimeQ[ # ] &]
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CROSSREFS
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Sequence in context: A001173 A107803 A088712 this_sequence A103654 A079385 A091272
Adjacent sequences: A090150 A090151 A090152 this_sequence A090154 A090155 A090156
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KEYWORD
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nonn,base
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 22 2003
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