The book is now available! 13131...13131 (25-digits)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

                                                 13131 3131313131 3131313131
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The smallest palindromic prime greater than 131 formed by alternating 1 and 3. It has a square number of digits (25) and its sum of digits is also a square number (49). [Gallardo]


  Submitted: 2003-12-31 12:20:54;   Last Modified: 2008-01-30 11:28:00.

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