The book is now available! 28222149
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ 28222149 is a semiprime S = A * B (with A = 3 and B = 9407383) such that A.B , B.A , S.A , S.B , A.S , S.A.B , S.B.A , A.S.B , A.B.S , B.S.A , B.A.S are all semiprime (dots here mean concatenation). [Tolgede]

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