const math.MinInt64

8 uses

	math (current package)
		const.go#L51: 	MinInt64  = -1 << 63            // -9223372036854775808

	math/big
		float.go#L816: 			return math.MinInt64, acc
		float.go#L826: 			return math.MinInt64, Above

	go.uber.org/zap
		field.go#L36: 	_minTimeInt64 = time.Unix(0, math.MinInt64)

	google.golang.org/grpc/internal/serviceconfig
		duration.go#L119: 	const minSeconds = math.MinInt64 / int64(time.Second)
		duration.go#L120: 	const minNanosAtMinSeconds = math.MinInt64 % int64(time.Second)
		duration.go#L125: 		*d = Duration(math.MinInt64)

	google.golang.org/protobuf/types/known/durationpb
		duration.pb.go#L182: 			return time.Duration(math.MinInt64)