77577...77577 (25-digits)

This number is a prime.

77577 7555755555 7555777577

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The only square congruent prime of order 5 of form aabaaabbbabbbbbabbbaaabaa. Shall we call it a “rhombus” prime? Note that it is also a prime-digit prime. [Loungrides]

Submitted: 2011-04-18 14:42:49; Last Modified: 2018-11-29 12:39:32.