01 March 2015 3 7K Report

Ramanujan-Nagell equation is:

2n - 7 = x2

with positive solutions:

(n, x) = (3,1), (4, 3), (5, 5), (7, 11) and (15, 181).

References to the applications:

  •  H. S. Shapiro and D. L. Slotnick, "On the mathematical theory of error-correcting codes", IBM J. Res. Develop. 3 (1959), 25-34.
  •  D. G. Mead,  "The equation of Ramanujan-Nagell and [y2]", Proc. of Amer. Math. Soc. 41 No. 2 (1973), 333-341.
  • More Omer I Eid's questions See All
    Similar questions and discussions