Abstract.
Let p i , 1≦ i ≦ 5, be prime numbers. It is proved that every sufficiently large integer N that satisfies N ≡ 5(mod 24) can be written as N = p21 + p22 + p23 + p24 + p25, where \( |\sqrt {\frac{N} {5}} - p_i | \leqq N^{\frac{1} {2} - \frac{9} {{280}} + \varepsilon } . \)
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Received: 10 February 2005