LAUSR

Abstract The energy spectrum of primary cosmic rays at energies between 2 $$\times 10^{13}$$ and 3 $$\times 10^{17}$$ eV is presented according to data from the Tien Shan array on the basis of the detection of the number of electrons in extensive air showers. In the energy range of $$5\times 10^{15}{-}3\times 10^{17}$$ eV, the spectrum was obtained by means of the HADRON array and was extended to the region of lower energies from $$2\times 10^{13}$$ eV on the basis of the results of an individual experiment. The changes in the slope of the spectrum in the energy range of $$10^{16}{-}3\times 10^{17}$$ eV and a feature of this spectrum at about $$10^{17}$$ eV are analyzed in detail and are described. The spectrum in question is compared with the results obtained at some other arrays.