Abstract
It is established that all even positive integers up to N but at most O(N 15/16+ɛ) exceptions can be expressed in the form p 21 + p 32 + p 43 + p 54 , where p 1, p 2, p 3 and p 4 are prime numbers.
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Supported by National Natural Science Foundation of China (Grant No. 11326205)
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Zhao, L.L. The exceptional set for sums of unlike powers of primes. Acta. Math. Sin.-English Ser. 30, 1897–1904 (2014). https://doi.org/10.1007/s10114-014-3661-y
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DOI: https://doi.org/10.1007/s10114-014-3661-y