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The smallest Sophie Germain prime that is also a strong prime with digits that alternate in parity.

2129 is the smallest Sophie Germain prime that is also a twin prime with digits that alternate in parity.

2129, when concatenated with the next 2 primes, is prime: 212921312137 is prime. [Noll]

 

  Submitted: 2009-08-09 13:27:32;   Last Modified: 2016-03-01 05:38:10.



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