17777...77771 (49-digits)
This number is a prime.
177777777 7777777777 7777777777 7777777777 7777777771
Single Curio View: (Seek other curios for this number)
The only square-congruent plateau prime of order 7. [Loungrides]
Submitted: 2010-03-05 17:53:50; Last Modified: 2014-08-30 15:16:45.
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