OFFSET
1,1
COMMENTS
LINKS
Jonathan Vos Post, Sums of three Mersenne primes, and prime sums of three Mersenne primes, SeqFan list, Mar 5, 2010.
MATHEMATICA
With[{mps=Select[2^Range[50]-1, PrimeQ]}, Union[Total/@Tuples[mps, 2]]] (* Harvey P. Dale, Aug 11 2012 *)
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
M. F. Hasler, Mar 06 2010
STATUS
approved