n=5, sweeps=6

a random symmetric matrix A:
    0.840    0.394    0.783    0.798    0.912
    0.394    0.198    0.335    0.768    0.278
    0.783    0.335    0.554    0.477    0.629
    0.798    0.768    0.477    0.365    0.513
    0.912    0.278    0.629    0.513    0.952

the result of Jacobi diagonalization: 
sweeps	 = 6
eigenvalues:
   -0.557   -0.124    0.069    0.461    3.059

check: V^T*A*V should be diagonal with above eigenvalues:
   -0.557   -0.000    0.000    0.000   -0.000
   -0.000   -0.124    0.000   -0.000    0.000
    0.000    0.000    0.069   -0.000   -0.000
    0.000   -0.000   -0.000    0.461    0.000
   -0.000    0.000   -0.000    0.000    3.059