28571...28571 (29-digits)

This number is a prime.

                                             285714285 7142857142 8571428571

Just showing those entries submitted by 'Green': (Click here to show all)

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

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