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(another Prime Pages' Curiosity)
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+ The smallest prime whose reciprocal contains a period that is exactly 1/3 of the maximum length. [Wells]

+ Illinois has two area codes that are multiples of 103: 309 (3 * 103) and 618 (6 * 103). [Litman]

+ Proof, an award-winning play by David Auburn, revolves around a mysterious mathematical proof involving prime numbers left behind in 103 notebooks by a young woman's brilliant father.

+ The least integer which is not sum or difference of two integers all whose prime factors are 2 and 3. [Crespi de Valldaura]

+ The world's largest tree is the General Sherman Tree, a sequoia in Sequoia National Park, California. Its trunk is roughly 103 feet in circumference. [Jolly]

+ The smallest prime comparable to all minimal primes in base 4. [Rupinski]

+ 3 and 103 are prime, as are 3*2^103-1 and 103*2^3-1. There is no other pair of primes less than 1000 with this property. [Hartley]

+ 103 + (10!)^3 is prime. [Patterson]

+ M103 and NGC 103 are both open clusters of stars in Cassiopeia. [Necula]

+ 103 divides the concatenation of the integers 103 down to 1. [De Geest]

+ There are exactly 103 geometrical forms of magic knight's tour of the chessboard.

+ Using a standard dartboard, 103 is the lowest possible prime that cannot be scored with two darts.

+ Astronomer Charles Messier cataloged 103 objects in his list of nebulae. [McCranie]

+ The smallest Cyclops prime that's also a twin, a cousin, and a sexy prime. [Punches]

+ One Hundred and Three is a poem by Henry Lawson (often called Australia's "greatest writer") about his prison number.

+ The smallest acute-angled prime. [Pol]

+ The smallest positive integer with no double-base representation of length 2. (Vassil S. Dimitrov, Everett W. Howe, Lower bounds on the lengths of double-base representations, January 23, 2010). [Post]

+ Operation Entebbe involved the Israeli rescue of 103 hostages from a French airliner hijacked by members of the Palestine Liberation Organization.

+ In the movie, "Naked Gun 2 1/2," the number of the bus under which "Nordberg" becomes stuck is 103.

+ The book 103 Mathematical Curiosities: Theory of Numbers, Figures and Relationships in Contemporary Mathematics by Pietro Paolo Lava and Giorgio Balzarotti deals with 103 short monographic chapters on various topics of mathematics concerning the theory of numbers.

(There are 10 curios for this number that have not yet been approved by an editor.)

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