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A068842
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Smallest prime larger than 2^n whose digits begin with those of 2^n.
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1
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11, 23, 41, 83, 163, 3203, 641, 1283, 25601, 51203, 10243, 20483, 40961, 81929, 163841, 327689, 6553621, 1310723, 2621447, 5242883, 10485767, 20971529, 41943049, 838860817, 167772161, 335544323, 6710886407, 1342177283
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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EXAMPLE
| a(5) = 3203 with leading digits 32 = 2^5.
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MATHEMATICA
| f[n_] := For[x=10, True, x*=10, For[y=0, y<x, y++, If[PrimeQ[x*n+y], Return[x*n+y]]]]; a[n_] := f[2^n]
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CROSSREFS
| Cf. A068841.
Sequence in context: A052034 A077041 A190797 * A199848 A191235 A146451
Adjacent sequences: A068839 A068840 A068841 * A068843 A068844 A068845
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KEYWORD
| nonn,base
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 10 2002
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EXTENSIONS
| Edited by Dean Hickerson (dean.hickerson(AT)yahoo.com), Jun 09 2002
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