555555555551111111111
This number is a prime.
5 5555555555 1111111111
Single Curio View: (Seek other curios for this number)
Eleven 5's followed by five 11's is prime. [De Geest]
Submitted: 2004-02-08 13:48:16; Last Modified: 2008-01-30 17:28:00.
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