Exhibit 11.1 PRIMUS TELECOMMUNICATIONS GROUP, INCORPORATED COMPUTATIONS OF EARNINGS PER SHARE (in thousands, except per share amounts) Three Months Ended Nine Months Ended September 30, September 30, ---------------------------------- ---------------------------------- 1997 1996 1997 1996 --------------- --------------- --------------- --------------- Weighted average common shares outstanding: Average shares outstanding during period 17,781 11,714 17,780 10,420 Cheap stock (1) - 66 - 728 Cheap options (1) - 1,662 - 1,659 --------------- --------------- --------------- --------------- Total primary weighted average common shares 17,781 13,442 17,780 12,807 =============== =============== =============== =============== Non Cheap options - 86 - 86 --------------- --------------- --------------- --------------- Total fully diluted weighted average common shares 17,781 13,528 17,780 12,893 =============== =============== =============== =============== Net loss applicable to common shares: Net loss $ (10,591) $ (2,421) $ (24,373) $ (5,653) =============== =============== =============== =============== Loss per common share and common share equivalent - Primary $ (0.60) $ (0.18) $ (1.37) $ (0.44) =============== =============== =============== =============== Loss per common share and common share equivalent - Fully Diluted $ (0.60) $ (0.18) $ (1.37) $ (0.44) =============== =============== =============== =============== (1) Pursuant to Staff Accounting Bulletin Number 83, for proper calculation of the three and nine months ended September 30, 1996 weighted average common shares outstanding, stock options granted and stock issued within one year prior to Primus's November 7, 1996 initial public offering have been treated as outstanding for all of 1996 using the treasury stock method. In the three and nine months ended September 30, 1997, the weighted average common shares outstanding has been calculated under Accounting Principles Board (APB) Statement No. 15.