...other funs:
Euclidians, showFactors, changeBaseArr, caesar, rsa,
inverseMod, IntToModTups (large number math for PC's)
crfindnSolnAfterxInEqm (solve saw wave LL,RL,LR,... intersects)
congruence, plots, y-shifted triangular wave solve, testing
(for historic reasons files are also in https://sourceforge.net/projects/periodictablemm/)