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The nth Prime Page will now find any of the first 2.623˙10^{15} primes or
π(x) for x up to 10^{17}. 991, 99991, and 9999991 are each prime. [Avrutin] This number, as well as 331 and 661, are all prime. Note that the product of these three primes is a Carmichael Number. [Patterson] The largest threedigit permutable prime. 991^2 = 982081 and 982 + 0 + 8 + 1 = 991. [Meller] Florida angler Allen Ogle caught a 991pound Hammerhead Shark on May 30, 1982.
(There is one curio for this number that has not yet been approved by an editor.) To link to this page use /curios/page.php?number_id=2154
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