const math.MaxInt64

4 uses

	math (current package)
		const.go#L46: 	MaxInt64  = 1<<63 - 1

	math/big
		float.go#L813: 		return math.MaxInt64, Below
		float.go#L822: 		return math.MaxInt64, Below

	mime/multipart
		formdata.go#L48: 			maxValueBytes = math.MaxInt64