11011...11011 (221-digits)

This number is a prime.

1 1011000110
0000110000 0001100000 0000110000 0000000110 0000000000 0011000000 0200000001
1000000023 2000000011 0000000235 3200000001 1000000023 2000000011 0000000200
0000011000 0000000000 1100000000 0001100000 0000110000 0001100000 1100011011

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The smallest diamond-congruent prime of order 11 containing a prime sum of digits. [Patterson]

Submitted: 2004-01-04 20:40:19; Last Modified: 2008-01-30 17:28:00.