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(another Prime Pages' Curiosity)
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+ 213466917 - 1 is the first prime number to be found to have more digits than the year it was discovered squared, i.e., more than 20012. [Luhn]

+ Click here for information on the 39th Mersenne prime.

+ The largest known Mersenne prime exponent that is an emirp. Note that the sum of its digits is also an emirp. [Loungrides]




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