33338...83333 (81-digits)

This number is a prime.

                                                                3 3338333333
3383333333 3833333333 8333388888 8888333383 3333333833 3333338333 3333383333

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

+

    3 3 3 3 8 3 3 3 3
    3 3 3 3 8 3 3 3 3
    3 3 3 3 8 3 3 3 3
    3 3 3 3 8 3 3 3 3
    8 8 8 8 8 8 8 8 8
    3 3 3 3 8 3 3 3 3
    3 3 3 3 8 3 3 3 3
    3 3 3 3 8 3 3 3 3
    3 3 3 3 8 3 3 3 3 
The only plus sign prime of order 9. [Loungrides]

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