Abstract:
Hua Loo-Keng's problem is solved for primes, four of which have binary expansions of a special form, whilst the fifth satisfies the inequality $\{(1/2)p^{1/c}\}<1/2$, where $c\in (1,2]$.
Bibliography: 13 titles.
Keywords:Hua Loo-Keng's problem, circle method, trigonometric sums, nonlinear additive problem for primes.