Is there anything with binary numbers declaration?

[Yassinproweb]

`module main

fn main() {
// numbers
a := 0xfffffff
b := 0b1111111111111111111111111111111
c := 123
d := 0o7777777777

println('${a}, ${b}, ${c}, ${d}')

}
`

I dont know why but this b gives me a number in the terminal