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211 (in the 6th shell of a Modulo-40 unit circle) is congruent with the prime number 20731 (in the 519th shell of a Modulo-40 unit circle). Both primes occupy position #11 in their respective shells. [Roberts]


  Submitted: 2010-05-22 23:53:26;   Last Modified: 2010-05-23 08:16:35.

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