I have some long hexadecimal numbers (48 hex digits) I want to use. But ibase:16 doesn't seem to accept non-numeric characters as input: (%i1) ibase:16$ (%i2) 1000; (%o2) 4096 (%i3) FF24; (%o3) FF24, Can anybody enlighten me here? Oh: Maxima 5.15.0, on linux, using clisp. Thanks, Alasdair