Smalltalk: BASErNumber (with BASE <=36)
(https://en.wikipedia.org/wiki/Smalltalk#Literals)
Samples:
2r10
8r12345670
10r1234567890
16r1234567890abcdef
36r1234567890abcdef...xyz
(https://en.wikipedia.org/wiki/Smalltalk#Literals)
Samples:
2r10
8r12345670
10r1234567890
16r1234567890abcdef
36r1234567890abcdef...xyz