UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                  SCHEDULE 13G


                    UNDER THE SECURITIES EXCHANGE ACT of 1934
                               (AMENDMENT NO. 1 )*

 Primus Telecommunications Group, Incorporated (Formerly Trescom International,
 Inc.)
                                (NAME OF ISSUER)

                           $.01 par value Common Stock
                         (TITLE OF CLASS OF SECURITIES)

                                    741929103
                                 (CUSIP NUMBER)

                                December 31, 1998
             (DATE OF EVENT WHICH REQUIRES FILING OF THIS STATEMENT)

     Check the  appropriate  box to designate the rule pursuant to which
this Schedule is filed:

     [  X ]  Rule 13d-1(b)

     [    ]  Rule 13d-1(c)

     [    ]  Rule 13d-1(d)

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the Notes)

CUSIP NO. 741929103 13G 1 NAME OF REPORTING PERSON S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Rockefeller & Co., Inc. I.R.S. Identification No.: 13-3006584 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* Not applicable (a) |_| (b) |_| 3 SEC USE ONLY 4 CITIZENSHIP OR PLACE OF ORGANIZATION New York 5 SOLE VOTING POWER NUMBER OF Not applicable. SHARES 6 SHARED VOTING POWER Not applicable. BENEFICIALLY 7 SOLE DISPOSITIVE POWER OWNED BY Not applicable EACH REPORTING 8 SHARED DISPOSITIVE POWER Not applicable. PERSON WITH 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON Not applicable. 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* Not applicable. 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 Not applicable. 12 TYPE OF REPORTING PERSON* IA *SEE INSTRUCTION BEFORE FILLING OUT!

Item 1(a). Name of Issuer: Primus Telecommunications Group, Incorporated Item 1(b). Address of Issuer's Principal Executive Offices: 1700 Old Meadow Road, Suite 300 McLean, VA 22102 Item 2(a). Name of Person Filing: Rockefeller & Co., Inc. Item 2(b). Address of Principal Business Office: 30 Rockefeller Plaza, New York, New York 10112 Item 2(c). Citizenship: New York Item 2(d). Title of Class of Securities: $.01 par value Common Stock Item 2(e). CUSIP Number: 741929103 Item 3. If this statement is filed pursuant to Rules 13d- 1(b), or 13d-2(b), check whether the person filing is a: (a) Broker or Dealer registered under Section 15 of the Act, (b) Bank as defined in Section 3(a)(6) of the Act, (c) Insurance Company as defined in Section 3(a)(19) of the Act, (d) Investment Company registered under Section 8 of the Investment Company Act, (e) X Investment Adviser registered under Section 203 of the Investment Advisers Act of 1940,

(f) Employee Benefit Plan, Pension Fund which is subject to the provisions of the Employee Retirement Income Security Act of 1974 or Endowment Fund; see 13d-(b)(1)(ii)(F), (g) Parent Holding Company, in accordance with Rule 13d-1(b)(ii)(G), (h) Group, in accordance with Rule 13d-1(b)(1)(ii)(H). Item 4. Ownership Not applicable. Item 5. Ownership of Five Percent or Less of a Class. If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [X]. Item 6. Ownership of More than Five Percent on Behalf of Another Person. Not Applicable. Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company. Not Applicable. Item 8. Identification and Classification of Members of the Group. Not Applicable. Item 9. Notice of Dissolution of Group. Not Applicable.

Item 10. Certification. Inasmuch as the reporting person is no longer the beneficial owner of more than 5 percent of the number of shares outstanding of the issuer of the securities referenced herein, the reporting person has no further reporting obligation under Section 13(d) of the Securities Act with respect to such issuer. SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. February 12, 1999 (Date) (Signature) /s/ David A. Strawbridge David A. Strawbridge, Vice President (Name/Title)