Andersen, J. K. "Chen AP3 with 3074 digits." http://groups.yahoo.com/group/primeform/message/6381.Andersen, J. K. "Chen Prime with 70301 digits." http://groups.yahoo.com/group/primeform/message/6481.Chen, J. R. "On the Representation of a Large Even Integer as the Sum of a Prime and the Product of at Most Two Primes." Scientia Sinica16, 157-176, 1973.Evard, J.-C. "Almost Twin Primes and Chen's Theorem." http://www.math.utoledo.edu/~jevard/Page015.htm.Green, B. and Tao, T. "Restriction Theory of the Selberg Sieve, with Applications." J. Théor. nombres Bordeaux18, 147-182, 2006.Sloane, N. J. A. Sequences A102540 and A109611 in "The On-Line Encyclopedia of Integer Sequences."