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129 is the number following 128 and preceding 130[1].

Properties[]

  • 129 is deficient.[10]
  • Its prime factorization is 31 × 431.


Approximations[]

Notation Lower bound Upper bound
Up-arrow notation 5 ↑ 3
Scientific notation 1.29 x 102 1.291 x 102
Slow-growing hierarchy \(g_{\omega^{\omega}}(3)\) \(g_{\omega^{\omega}}(4)\)
Copy notation 1[3] 2[3]
Chained arrow notation 5 → 3
Bowers' Exploding Array Function/Bird's array notation {5,3}
Fast-growing hierarchy f1(63) f1(64)
Hardy hierarchy Hω(64) Hω(65)
Middle-growing hierarchy m(ω,7) m(ω,8)
Hyper-E notation E2.1106
Hyper-E notation (non-10 base) \(E[5]3\)
Hyperfactorial array notation 5! 6!
X-Sequence Hyper-Exponential Notation 5{1}3
Steinhaus-Moser Notation 3[3] 4[3]
PlantStar's Debut Notation [1] [2]
H* function H(-0.3) H(-0.2)
Bashicu matrix system with respect to version 4 (0)[11] (0)[12]
m(n) map m(1)(3) m(1)(4)
s(n) map \(s(1)(\lambda x . x+1)(63)\) \(s(1)(\lambda x . x+1)(64)\)

Sources[]