UPDATE 6-Dell to go private in landmark $24.4 billion deal

* Parties paying $13.65/share in cash * Microsoft putting up $2 billion loan * Dell shares rise 1.1 percent, still below offer price By Poornima Gupta and Nadia Damouni and Greg Roumeliotis SAN FRANCISCO/NEW YORK, Feb 5 (Reuters) - Michael Dell struck a deal to take Dell Inc private for $24.4 billion in the biggest leveraged buyout since the financial crisis, partnering with the Silver Lake private equity firm and Microsoft Corp to try to turn around the struggling computer com