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                                                 12233 3444455555 4444333221

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

+ This palindromic prime of 5-by-5 digits consists of five 5's, surrounded on each side by four 4's, three 3's, two 2's and one 1. (The only other similar prime is 122333221.) [Hasler]




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