A conjecture about sums of uniquely valued primes

[Loren Booda]

"Of the numbers N>1, only 4 and 6 cannot be expressed as a sum of prime numbers with unique values."

[JCVD]

http://www.physicsforums.com/showthread.php?t=303457

[Loren Booda]

Thanks for the pointer, JCVD. Too simple to be undiscovered!