Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Four squares of primes and powers of 2   By developing the method of Wooley on the quadratic Waring-Goldbach problem,
we prove that all sufficiently large even integers can be expressed as a sum of
four squares of primes and 46 powers of 2.

33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org