  Confinement time of electron plasmas trapped using a purely toroidal magnetic
field has been extended to $\sim 100$ s in a small aspect ratio ($R_{o}/{a}
\sim {1.59}$, $R_o$ and $a$ are device major and minor radius, respectively),
partial torus. It surpasses the previous record by nearly two orders of
magnitude. Lifetime is estimated from the frequency scaling of the linear
diocotron mode launched from sections of the wall, that are also used for mode
diagnostics. Confinement improves enormously with reduction in neutral pressure
in the presence of a steady state magnetic field. In addition, confinement is
seen to be independent of the magnetic field, a distinguishing feature of
Magnetic Pumping Transport (MPT) theory. Since MPT predicts an upper limit to
confinement comparisons have been made between our experiments and MPT
estimates.
