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The energies of the most energetic extensive air showers observed at theYakutsk array have been estimated with help of the all detectors readingsinstead of using of the standard procedure with a parameter s(600). The energyof the most energetic extensive air shower observed at the Yakutsk arrayhappened to be 200, 200, 180 and 165 EeV with the values of the Xi**2 functionper one degree of freedom 0.9, 1., 0.9 and 1.1 for the primary protons andhelium, oxygen and iron nuclei accordingly.

The possible feature of the energy spectrum of the primary cosmic rays at ultra-high energies