Daftar tetapan matematis
2000 hingga seterusnya

| Nama | Simbol | Ekspansi desimal | Rumus | Tahun | Himpunan |
| --- | --- | --- | --- | --- | --- |
| Tetapan Foias (α)  |  F_{\alpha } | 1.18745 23511 26501 05459  |  x_{n+1}=\left(1+{\frac {1}{x_{n}}}\right)^{n}{\text{ untuk }}n=1,2,3,\ldots  Tetapan Foias merupakan bilangan real tunggal sehingga jika  x_{1}=\alpha  maka barisan divergen menuju  \infty . Ketika  x_{1}=\alpha ,  \,\lim _{n\to \infty }x_{n}{\frac {\ln n}{n}}=1. | 2000 |  |
| Tetapan Foias (β) |  F_{\beta } | 2.29316 62874 11861 03150  |  x^{x+1}=(x+1)^{x} | 2000 |  |
| Rumus Raabe  |  {\zeta '(0)} | 0.91893 85332 04672 74178  |  \int \limits _{a}^{a+1}\log \Gamma (t)\,\mathrm {d} t={\tfrac {1}{2}}\log 2\pi +a\log a-a,\quad a\geq 0 | Sebelum tahun 2011 |  |
| Tetapan Kepler–Bouwkamp  |  {\rho } | 0.11494 20448 53296 20070  |  \prod _{n=3}^{\infty }\cos \left({\frac {\pi }{n}}\right)=\cos \left({\frac {\pi }{3}}\right)\cos \left({\frac {\pi }{4}}\right)\cos \left({\frac {\pi }{5}}\right)... | Sebelum tahun 2013 |     |
| Tetapan Prouhet–Thue–Morse  |  \tau  | 0.41245 40336 40107 59778   |  \sum _{n=0}^{\infty }{\frac {t_{n}}{2^{n+1}}} dimana  {t_{n}} merupakan barisan Thue–Morse dan \tau (x)=\sum _{n=0}^{\infty }(-1)^{t_{n}}\,x^{n}=\prod _{n=0}^{\infty }(1-x^{2^{n}}) | Sebelum tahun 2014 |  \mathbb {T}  |
| Tetapan Heath–Brown–Moroz  |  {C}_{\text{HBM}} | 0.00131 76411 54853 17810  |  {\underset {p_{n}:\,{\text{prima}}}{\prod _{n=1}^{\infty }\left(1-{\frac {1}{p_{n}}}\right)^{7}\left(1+{\frac {7p_{n}+1}{p_{n}^{2}}}\right)}} | Sebelum tahun 2002 |  \mathbb {T} ? |
| Tetapan Lebesgue  |  {C_{1}} | 0.98943 12738 31146 95174  |  \lim _{n\to \infty }\!\!\left(\!{L_{n}{-}{\frac {4}{\pi ^{2}}}\ln(2n{+}1)}\!\!\right)\!{=}{\frac {4}{\pi ^{2}}}\!\left({\sum _{k=1}^{\infty }\!{\frac {2\ln k}{4k^{2}{-}1}}}{-}{\frac {\Gamma '({\tfrac {1}{2}})}{\Gamma ({\tfrac {1}{2}})}}\!\!\right) | Sebelum tahun 2002 |  |
| Tetapan Bois–Romand kedua (es)  |  {C_{2}} | 0.19452 80494 65325 11361  |  {\frac {e^{2}-7}{2}}=\int _{0}^{\infty }\left|{{\frac {\mathrm {d} }{\mathrm {d} t}}\left({\frac {\sin t}{t}}\right)^{n}}\right|\,\mathrm {d} t-1 | Sebelum tahun 2003 |  \mathbb {T}  |
| Tetapan Stephens  |  C_{S} | 0.57595 99688 92945 43964  |  \prod _{n=1}^{\infty }\left(1-{\frac {p}{p^{3}-1}}\right) | Sebelum tahun 2005 |  \mathbb {T} ? |
| Tetapan Taniguchi  |  C_{T} | 0.67823 44919 17391 97803  |  \prod _{n=1}^{\infty }\left(1-{\frac {3}{{p_{n}}^{3}}}+{\frac {2}{{p_{n}}^{4}}}+{\frac {1}{{p_{n}}^{5}}}-{\frac {1}{{p_{n}}^{6}}}\right)dimana  p_{n} adalah prima. | Sebelum tahun2005 |  \mathbb {T} ? |
| Tetapan Copeland–Erdős  |  {{\mathcal {C}}_{CE}} | 0.23571 11317 19232 93137  |  \sum _{n=1}^{\infty }{\frac {p_{n}}{10^{n+\sum \limits _{k=1}^{n}\lfloor \log _{10}{p_{k}}\rfloor }}} | Sebelum tahun 2012 |  \mathbb {R} \setminus \mathbb {Q}  |
| Dimensi Hausdorff, segitiga Sierpinski  |  {\log _{2}3} | 1.58496 25007 21156 18145  |  {\frac {\log 3}{\log 2}}={\frac {{\underset {n=0}{\overset {\infty }{\sum }}}^{\infty }{\frac {1}{2^{2n+1}(2n+1)}}}{\sum _{n=0}^{\infty }{\frac {1}{3^{2n+1}(2n+1)}}}}={\frac {{\frac {1}{2}}+{\frac {1}{24}}+{\frac {1}{160}}+\cdots }{{\frac {1}{3}}+{\frac {1}{81}}+{\frac {1}{1215}}+\cdots }} | Sebelum tahun 2002 |  \mathbb {T}  |
| Tetapan Landau–Ramanujan  |  K | 0.76422 36535 89220 66299  |  {\frac {1}{\sqrt {2}}}\prod _{p\equiv 3\!\!\!\!\!\mod \!4}\!\!{\underset {\!\!\!\!\!\!\!\!p:{\text{ prima}}}{\left(1-{\frac {1}{p^{2}}}\right)^{-{\frac {1}{2}}}}}\!\!={\frac {\pi }{4}}\prod _{p\equiv 1\!\!\!\!\!\mod \!4}\!\!{\underset {\!\!\!\!p:{\text{ prima}}}{\left(1-{\frac {1}{p^{2}}}\right)^{\frac {1}{2}}}} | Sebelum tahun 2005 |  \mathbb {T} ? |
| Tetapan Brun 4 = Σ balikkan bilangan prima kembar empat  |  {B}_{\,4} | 0.87058 83799 75  |  \sum \left({\frac {1}{p}}+{\frac {1}{p+2}}+{\frac {1}{p+6}}+{\frac {1}{p+8}}\right)\scriptstyle \quad {p,\;p+2,\;p+6,\;p+8:{\text{ prima}}}  \left({\frac {1}{5}}+{\frac {1}{7}}+{\frac {1}{11}}+{\frac {1}{13}}\right)+\left({\frac {1}{11}}+{\frac {1}{13}}+{\frac {1}{17}}+{\frac {1}{19}}\right)+\dots  | Sebelum tahun 2002 |  |
| Radikal tersarang Ramanujan  |  R_{5} | 2.74723 82749 32304 33305 |  {\sqrt {5+{\sqrt {5+{\sqrt {5-{\sqrt {5+{\sqrt {5+{\sqrt {5+{\sqrt {5-\cdots }}}}}}}}}}}}}}\;={\frac {2+{\sqrt {5}}+{\sqrt {15-6{\sqrt {5}}}}}{2}} | Sebelum tahun 2001 |  \mathbb {A}  |