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(another Prime Pages' Curiosity)
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+ The consecutive primes 1399 and 1409 have the property that 1399*1409 +/- (1399+1409) are both prime. Moreover, 7^1399-6^1399 is prime, and so is (12*10^1399-21)/99 = 1212...2121, a smoothly undulating palindromic prime with 1399 digits. [Hasler]

+ In 1882, Lucas noted that Le Lasseur found the first known prime factor (1399) of the Mersenne number 2233-1.

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




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