Abramowitz and Stegun (1964, Chapter 23) includes exact
values of , , ;
, ,
, , 20D;
, , 18D.
Wagstaff (1978) gives complete prime factorizations of and
for and , respectively. In
Wagstaff (2002) these results are extended to and
, respectively, with further complete and partial factorizations
listed up to and , respectively.
For information on tables published before 1961 see
Fletcher et al. (1962, v. 1, §4) and
Lebedev and Fedorova (1960, Chapters 11 and 14).