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139 is the number following 138 and preceding 140.[1], and its factors are {1,139}.


Properties

  • It is an odd number[2].
  • The 139th element has not been discovered.


Approximations

Notation Expression
Up-arrow notation 11 ↑ 2
Fast-growing hierarchy f1(69)
Hardy hierarchy Hω(69)
Middle-growing hierarchy m(ω,7)


Sources

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