28571...28571 (29-digits)

This number is a prime.

285714285 7142857142 8571428571

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The concatenation of the two primes 2857 and 1428571428571428571428571. Note the periods of 2/7 and 1/7. [Green]

Submitted: 2009-09-21 03:39:55; Last Modified: 2009-09-21 14:01:30.