The book is now available! 619181
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ The only six-digit invertible prime p formed from the reverse concatenation of two three-digit consecutive strobogrammatic primes: {619, 181}. Curiously, p is also expressible as the sum of two squares: (659^2 + 430^2). [Jha]

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