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104 (one hundred ndfour) is the
natural number In mathematics, the natural numbers are the numbers 0, 1, 2, 3, and so on, possibly excluding 0. Some start counting with 0, defining the natural numbers as the non-negative integers , while others start with 1, defining them as the positive in ...
following 103 and preceding
105 105 may refer to: *105 (number), the number * AD 105, a year in the 2nd century AD * 105 BC, a year in the 2nd century BC * 105 (telephone number), the emergency telephone number in Mongolia * 105 (MBTA bus), a Massachusetts Bay Transport Authority ...
.


In mathematics

104 is a refactorable number and a
primitive semiperfect number Primitive may refer to: Mathematics * Primitive element (field theory) * Primitive element (finite field) * Primitive cell (crystallography) * Primitive notion, axiomatic systems * Primitive polynomial (disambiguation), one of two concepts * Primi ...
. The smallest known 4-regular matchstick graph has 104 edges and 52 vertices, where four unit
line segment In geometry, a line segment is a part of a line (mathematics), straight line that is bounded by two distinct endpoints (its extreme points), and contains every Point (geometry), point on the line that is between its endpoints. It is a special c ...
s intersect at every vertex. The second largest sporadic group \mathbb has a McKay–Thompson series, representative of a principal modular function is T_(\tau), with constant term a(0) = 104: :j_(\tau) = T_(\tau)+104 = \frac + 104 + 4372q + 96256q^2 + \cdots The Tits group \mathbb , which is the only finite simple group to classify as either a ''non-strict'' group of Lie type or sporadic group, holds a minimal faithful complex representation in 104 dimensions.


References

* Wells, D. ''
The Penguin Dictionary of Curious and Interesting Numbers ''The Penguin Dictionary of Curious and Interesting Numbers'' is a reference book for recreational mathematics and elementary number theory written by David Wells. The first edition was published in paperback by Penguin Books in 1986 in the UK, a ...
'' London: Penguin Group. (1987): 133 Integers {{Num-stub