77577...77577 (25-digits)

This number is a prime.

                                                 77577 7555755555 7555777577

Just showing those entries submitted by 'Loungrides': (Click here to show all)

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]