Greece's government debt remains highly unsustainable and will be "explosive" in the long run. The International Monetary Fund said this in its annual report on the Greek economy. The IMF said addressing the debt burden of the beleaguered nation will require significant debt relief from European institutions, including dramatically extending the grace periods and maturities of the loans. The IMF board is due to discuss the confidential report, which includes a debt sustainability analysis, on February 6, after which the findings will be made public. The pessimistic report, though in keeping with the fund's repeated statements on the topic, makes it less likely the IMF will participate in any new European loan deal for Greece.