Corrected On sequence nXn where x equal 09,18,27,36,45,54,63,72,81,90

[Meeussen Wouter (bkarnd)]

not within the lowest 10^5 trials:
test = ToString@{n09n, n18n, n27n, n36n, n45n, n54n, n63n, n72n, n81n, n90n};
 
	Select[Range[100000], 
  		And @@ PrimeQ[ToExpression[StringReplace[test,
			 "n" -> ToString[#]]]] &]
 returns the empty list
	{}

W.

(Please, send plaint text)



-----Original Message-----
From: Karima MOUSSAOUI [mailto:bouyao at wanadoo.fr]
Sent: maandag 23 februari 2004 18:16
To: seqfan at ext.jussieu.fr
Subject: Corrected On sequence nXn where x equal 09,18,27,36,45,54,63,72,81,90


Dear Seqfna,
Can anyone find n such that n09n, n18n,n27n,n36n,n45n,n54n,n63n,n72n,n81n,n90n, are all primes
where n09n designe concatenation of (n 09 n) (example 1091 is prime, 310931 is prime)
Thanks
M.Bouayoun


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