666666666666631
This number is a prime.
66666 6666666631
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(666666666666631, 666666666666643) is the first occurrence of two successive primes, each containing a baker’s dozen of successive d’s, (d=6), and which differ by a dozen. [Loungrides]
Submitted: 2010-12-25 07:46:19; Last Modified: 2019-02-07 12:52:40.
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