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A068692
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Largest n-digit prime with all even digits except for the least significant digit.
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3
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7, 89, 887, 8887, 88883, 888887, 8888861, 88888883, 888888887, 8888888809, 88888888801, 888888888887, 8888888888849, 88888888888889, 888888888888883, 8888888888888647, 88888888888888889, 888888888888888809
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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MAPLE
| for n from 1 to 40 do a := prevprime((10^n-1)/9*8+2):b := convert(a, base, 10):c := true:for i from 2 to nops(b) do if((b[i] mod 2)>0) then c := false:end if:end do:while(c=false) do a := prevprime(a):b := convert(a, base, 10):c := true:for i from 2 to nops(b) do if((b[i] mod 2)>0) then c := false:end if:end do:end do:q[n] := a:end do:seq(q[k], k=1..40);
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CROSSREFS
| Cf. A068690, A068691.
Sequence in context: A071363 A174616 A089394 * A178006 A053302 A068877
Adjacent sequences: A068689 A068690 A068691 * A068693 A068694 A068695
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KEYWORD
| base,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 03 2002
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EXTENSIONS
| More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 26 2002
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