The book is now available! 111191111
(just those submitted by Firoozbakht)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

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

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                              31111911113
                             3311119111133
                            333111191111333
                             9911119111199
                              91111911119
 
Each of the above five palindromic numbers is prime. 111191111 is the smallest palindromic prime with this property. [Firoozbakht]




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