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$ perl -wMstrict -le '$,=", "; print 42, 0xFF, 0b1111, 42 + 0xFF + 0b1
+111, 42 . 0xFF . 0b1111'
42, 255, 15, 312, 4225515

$ perl -wMstrict -le 'print 0xFFFFFFFF'
4294967295
...
Integer overflow in hexadecimal number at -e line 1.
Hexadecimal number > 0xffffffff non-portable at -e line 1.
2.95147905179353e+20

$ perl -wMstrict -le 'print hex( "0x".("F" x 2**29) )'
Integer overflow in hexadecimal number at -e line 1.
Hexadecimal number > 0xffffffff non-portable at -e line 1.
Inf