Jy. Liu et al., THE NUMBER OF POWERS OF 2 IN A REPRESENTATION OF LARGE EVEN INTEGERS (I), Science in China. Series A, Mathematics, Physics, Astronomy & Technological Sciences, 41(4), 1998, pp. 386-398
Under the Generalized Riemann Hypothesis, it is proved that for any in
teger k greater than or equal to 770 there is N-k >0 depending on k on
ly such that every even integer greater than or equal to N-k is a sum
of two odd prime numbers and k powers of 2.