SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

(Rule 13d-102)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
TO RULES 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED
PURSUANT TO RULE 13d-2(b)
(Amendment No. __)*

Primus Telecommunications Group, Incorporated

(Name of Issuer)

Common Stock

(Title of Class of Securities)

741929301

(CUSIP Number)

June 10, 2010

(Date of Event which Requires Filing of this

Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
o Rule 13d-1(b)
þ Rule 13d-1(c)
o Rule 13d-1(d)

Page 1 of 5

* 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 disclosures provided in a prior cover page.

The information required on 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. 741929301  13G Page 2  of  5 Pages 

1	NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Karen Singer
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
	(a)   o
	(b)   o
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION
	United States
		5	SOLE VOTING POWER
NUMBER OF			931,295
SHARES		6	SHARED VOTING POWER
BENEFICIALLY
OWNED BY			0
EACH		7	SOLE DISPOSITIVE POWER
REPORTING
PERSON			931,295
WITH:		8	SHARED DISPOSITIVE POWER
			0
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
	931,295
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
	o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
	9.6%
12	TYPE OF REPORTING PERSON
	IN

*SEE INSTRUCTIONS BEFORE FILLING OUT!

TABLE OF CONTENTS

	Item 1(a)
	Item 1(b)
	Item 2(a)
	Item 2(b)
	Item 2(c)
	Item 2(d)
	Item 2(e)
	Item 3. IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(b) OR 13d-2(b) or (c), CHECK WHETHER THE PERSON FILING IS A
	Item 4. OWNERSHIP: The reporting person has sole dispositive and voting power with respect to 931,295 shares of the reported securities as the trustee of Singer Children’s Management Trust
	Item 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS
	Item 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON
	Item 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY
	Item 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP
	Item 9. NOTICE OF DISSOLUTION OF GROUP
	Item 10. CERTIFICATION
SIGNATURE

Page 3 of 5

Item 1(a). Name of Issuer: Primus Telecommunications Group, Incorporated

Item 1(b).	Address of Issuers’s Principal Executive Offices:	7901 Jones Branch Drive, Suite 900,
		McLean, VA 22102

Item 2(a). Name of Person Filing: Karen Singer

Item 2(b).	Address of Principal Business Office or, if None, Residence:	212 Vaccaro Drive
		Cresskill, NJ 07626

Item 2(c). Citizenship: United States

Item 2(d). Title of Class of Securities: Common Stock, $0.001 par value

Item 2(e). CUSIP Number:  741929301

Item 3. IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(b) OR 13d-2(b) or (c), CHECK WHETHER THE
PERSON FILING IS A:

Not Applicable, this statement is filed pursuant to 13d-1(c)

Item 4. OWNERSHIP: The reporting person has sole dispositive and voting power with respect to 931,295 shares of the reported securities as the trustee of Singer Children’s Management Trust.

(a) 931,295

(b) 9.6%

(c) (i) sole voting power: 931,295

     (ii) shared voting power: 0

     (iii) sole dispositive power: 931,295

     (iv) shared dispositive power: 0

Item 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS:

Not Applicable.

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.

Page 4 of 5

Item 9. NOTICE OF DISSOLUTION OF GROUP:

Not Applicable.

Item 10. CERTIFICATION:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

Page 5 of 5

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.

Dated: June 15, 2010	/s/ Karen Singer
	Karen Singer