11111...33221 (40-digits)

This number is a prime.

1111111111 1111111111 1177777775 5555333221

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A prime containing eleven 11s, seven 7s, five 5s, three 3s, two 2s, and unity. [Patterson]

Submitted: 2007-09-10 19:36:51; Last Modified: 2008-01-30 17:28:00.