2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/69521In this paper we give Kummer's original type congruence relation modulo a prime power for the universal Bernoulli numbers. Although the index of the power is half of original congruence, this estimate is best possible.AMS-TeX, 14 pages. Errors in the first version were correctedNumber Theorytext