28571...28571 (29-digits)

This number is a prime.

                                             285714285 7142857142 8571428571

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

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell