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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) 907, 9907, 99907, 999907, and 9999907 are all primes; however, 99999907 is composite. The molecular weight of chlorophyll b is about 907. [Wu] Conjectured to be the largest prime that can be represented uniquely as the sum of three distinct positive squares (3^{2} + 13^{2} + 27^{2}). [Noe] The largest negated discriminant of imaginary quadratic fields with class number 3. There are 16 = 9+0+7 such discriminants. [Hasler] The largest area code (in physical size) in the United States. It covers the entire state of Alaska, except for the small southeastern community of Hyder. [Green] According to Hindu mythology, a great sage ("Kandu") once fell for and romanced with a celestial nymph ("Pramlocha") for 907 years before he came back to his senses and realized he had gone astray. [Beedassy]
(There are 2 curios for this number that have not yet been approved by an editor.)
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