OFFSET
1,1
COMMENTS
53 is not the sum of any power of 2 (from 0 to 5) and any power of 3 (from 0 to 3).
REFERENCES
Prime Curios!, The Dictionary of Prime Number Trivia, Chris K. Caldwell & G. L. Honaker, Jr., page 47-48, 2009.
LINKS
G. L. Honaker Jr. and C. Caldwell, Prime Curios!: 53.
MATHEMATICA
Complement[ Prime@ Range@ 100, Select[ Union[ Flatten[ Table[ 2^i + 3^j, {i, 0, 10}, {j, 0, 6}]]], PrimeQ@# &]]
CROSSREFS
KEYWORD
nonn
AUTHOR
Robert G. Wilson v, Feb 25 2010
STATUS
approved