Constant lexical_util::format::JULIA_HEX_LITERAL

pub const JULIA_HEX_LITERAL: u128 = NumberFormatBuilder::new()
    .digit_separator(num::NonZeroU8::new(b'_'))
    .mantissa_radix(16)
    .exponent_base(num::NonZeroU8::new(2))
    .exponent_radix(num::NonZeroU8::new(10))
    .case_sensitive_special(true)
    .integer_internal_digit_separator(true)
    .fraction_internal_digit_separator(true)
    .build(); // 13_302_989_070_119_888_563_462_601_766_774_769_676u128

Number format for a Julia literal floating-point number.