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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)

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There are 11 capital letters in the English alphabet that have vertical symmetry. Can you find them all? [Cook]


  Submitted: 2011-03-22 15:51:10;   Last Modified: 2011-03-23 07:31:53.

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