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Search: id:A158999
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| A158999 |
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Palprimes of the form m*reversal(m)+1, sorted on m. |
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+0
2
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OFFSET
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1,1
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COMMENT
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There is no further term up to 5*10^17. 1008001 is the only known palprime
which has two representations of the form m*reversal(m)+1 (m > reversal(m)).
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LINKS
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Carlos Rivera,P*R(P)+1 = Palprime
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MATHEMATICA
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r[n_]:=FromDigits[Reverse[IntegerDigits[n]]]; Do[If[m>=r[m]&&PrimeQ[m r[m]+1]
&& r[m r[m]+1]==m r[m]+1, Print[m r[m]+1]], {m, 710000000}]
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CROSSREFS
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Cf. A158997, A158998.
Sequence in context: A134996 A134998 A078790 this_sequence A069506 A123165 A098438
Adjacent sequences: A158996 A158997 A158998 this_sequence A159000 A159001 A159002
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KEYWORD
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base,more,nonn
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AUTHOR
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Farideh Firoozbakht (mymontain(AT)yahoo.com), Jul 09 2009
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