The book is now available! 15559
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ The digits of the prime 15559 appear as the final digits of the numbers in the sequence of centered tetrahedral numbers. The pattern 1-5-5-5-9 repeats for each successive group of 5 consecutive numbers in the sequence. The first five numbers in the sequence are 1,5,15,35,69. (15559 is also the zip code of Schellsburg PA.) [Green]

(There is one curio for this number that has not yet been approved by an editor.)

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