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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) Just showing those entries submitted by 'Poo Sung': (Click here to show all)
13333333333333/13 is prime. The numerator has thirteen 3's following 1. [Poo Sung] The 13th Mersenne prime is 2^{521}  1 and the 13th Lucas number is 521. [Poo Sung] Girolamo Cardano (15011576) divided cubic equations into 13 types (excluding x^3 = c and equations reducible to quadratics) in his work Ars Magna, which was the first Latin treatise devoted solely to algebra. [Poo Sung] 13 is the smallest prime having only one 1. [Poo Sung] At most 13 baseball players can be in play: 9 fielders, 3 runners, and 1 batter. [Poo Sung]
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