The book is now available! 74444...44447 (121-digits)
(another Prime Pages' Curiosity)
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                    7 4444444444 4444444444 4444444444 4444444444 4444444444
4444444444 4444444444 4444444444 4444444444 4444444444 4444444444 4444444447
+ The only square-congruent depression prime of order 11. [Loungrides]




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