7777557757577557777

This number is a prime.

                                                        777755775 7577557777

Single Curio View:   (Seek other curios for this number)
The only hexagon-congruent prime of order 3 whose the ring is an alternate number: 

     7 7 7 
    7 5 5 7 
   7 5 7 5 7 
    7 5 5 7 
     7 7 7
[Marcel]

Submitted: 2025-11-15 13:18:49;   Last Modified: 2025-11-15 15:52:23.
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