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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) A prime p such that the decimal fraction 1/p has the same period length as 1/p^{2}. [Richter] 487^{2} divides 10^{486}  1. 487 is the smallest prime p such that p and p^{3} have the same sum of digits. [Honaker] There are 487 Hadamard matrices of order 28. Note that 28 is a perfect number. [Rupinski] 487 = (4!_{2} + 8!_{2} + 7!_{2})  ((4) + (8) + (7)). Note that 487 is the smallest prime with this property. [Firoozbakht] Fermat claimed (correctly) that a number is the sum of three squares unless it is of the form 4^{n}(8m + 7), with n,m greater than or equal to 0. 487 is the first prime after 3 that divides the periodic part of the decimal representation of its reciprocal. [Noe] The Demilitarized Zone (DMZ) is 487 square miles. 487!+491 is the first titanic prime of form p!+q where p, q are consecutive primes. [Loungrides] The smallest of five consecutive full period primes (487, 491, 499, 503, 509). [Bowser] The smallest prime p such that all possible twodigit endings for prime numbers less than or equal to p occur at least once. [Honaker] The smallest prime number that produces three more primes when reiteratively doubled and reversed three consecutive times (479, 859, and 8171). [Gaydos] The smallest prime p such that reversal(2p) equals its previous prime. [Bajpai]
(There is one curio for this number that has not yet been approved by an editor.)
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