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December 20, 2014

December 20, 2014

Posted by **Mark** on Tuesday, September 8, 2009 at 7:06pm.

- math -
**Reiny**, Tuesday, September 8, 2009 at 8:05pmUsing your first two sentences, I see only the following possibilities

91

82

73

64

of these only 73 is prime.

I am assuming you wanted only a 2 digit number.

but don't the following also fit all your conditions ?

191,173,1873,1973,3491, .... ?

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