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(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ 512 is the smallest (and only known) cube such that 512*2^512-1 is prime. [Gupta]

+ 512 = 2^9. Both 2^9 +/- 9^2 are prime. This is the smallest number of the form 2^n such that both 2^n +/- n^2 are prime. [Astle]

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

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