Abstract We establish that every sufficiently large odd integer can be written as a sum of two squares, a cube, a fourth power, a fifth power, and two sixth powers of primes. In addition, we prove that every sufficiently large odd integer not divisible by 3 can be expressed as a sum of two squares, three fourth powers, a fifth power, and a sixth power of primes.
Geovane Matheus Lemes Andrade (Fri,) studied this question.
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