The book is now available! 2401
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ 2401 = (2+4+0+1)^pi(2+4+0+1). It is the smallest multidigit number with this property and there exists only one larger such number. [Firoozbakht]

+ Smallest fourth power that becomes prime when its most significant (or left-most) digit is deleted. The next is 279841. [Post]

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