Vanguard PrimeCap Fund (VPMCX) N-CSR Certified annual shareholder report (management investment company)

Certification Pursuant to 18 U.S.C. Section 1350,
As Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002

Name of Issuer: Vanguard Target Retirement Income Fund

        In connection with the Report on Form N-CSR of the above-named issuer that is accompanied by this certification, the undersigned hereby certifies, to his knowledge, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the issuer.

Date: October 22, 2004	/s/ John J. Brennan
	John J. Brennan
	Chief Executive Officer

Certification Pursuant to 18 U.S.C. Section 1350,
As Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002

Name of Issuer: Vanguard Target Retirement Income Fund

        In connection with the Report on Form N-CSR of the above-named issuer that is accompanied by this certification, the undersigned hereby certifies, to his knowledge, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the issuer.

Date: October 22, 2004	/s/ Thomas J. Higgins
	Thomas J. Higgins
	Treasurer

Certification Pursuant to 18 U.S.C. Section 1350,
As Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002

Name of Issuer: Vanguard Target Retirement 2005 Fund

        In connection with the Report on Form N-CSR of the above-named issuer that is accompanied by this certification, the undersigned hereby certifies, to his knowledge, that:

3. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

4. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the issuer.

Date: October 22, 2004	/s/ John J. Brennan
	John J. Brennan
	Chief Executive Officer

Certification Pursuant to 18 U.S.C. Section 1350,
As Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002

Name of Issuer: Vanguard Target Retirement 2005 Fund

        In connection with the Report on Form N-CSR of the above-named issuer that is accompanied by this certification, the undersigned hereby certifies, to his knowledge, that:

3. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

4. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the issuer.

Date: October 22, 2004	/s/ Thomas J. Higgins
	Thomas J. Higgins
	Treasurer

Certification Pursuant to 18 U.S.C. Section 1350,
As Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002

Name of Issuer: Vanguard Target Retirement 2015 Fund

        In connection with the Report on Form N-CSR of the above-named issuer that is accompanied by this certification, the undersigned hereby certifies, to his knowledge, that:

5. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

6. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the issuer.

Date: October 22, 2004	/s/ John J. Brennan
	John J. Brennan
	Chief Executive Officer

Certification Pursuant to 18 U.S.C. Section 1350,
As Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002

Name of Issuer: Vanguard Target Retirement 2015 Fund

        In connection with the Report on Form N-CSR of the above-named issuer that is accompanied by this certification, the undersigned hereby certifies, to his knowledge, that:

5. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

6. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the issuer.

Date: October 22, 2004	/s/ Thomas J. Higgins
	Thomas J. Higgins
	Treasurer

Certification Pursuant to 18 U.S.C. Section 1350,
As Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002

Name of Issuer: Vanguard Target Retirement 2025 Fund

        In connection with the Report on Form N-CSR of the above-named issuer that is accompanied by this certification, the undersigned hereby certifies, to his knowledge, that:

7. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

8. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the issuer.

Date: October 22, 2004	/s/ John J. Brennan
	John J. Brennan
	Chief Executive Officer

Certification Pursuant to 18 U.S.C. Section 1350,
As Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002

Name of Issuer: Vanguard Target Retirement 2025 Fund

        In connection with the Report on Form N-CSR of the above-named issuer that is accompanied by this certification, the undersigned hereby certifies, to his knowledge, that:

7. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

8. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the issuer.

Date: October 22, 2004	/s/ Thomas J. Higgins
	Thomas J. Higgins
	Treasurer

Certification Pursuant to 18 U.S.C. Section 1350,
As Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002

Name of Issuer: Vanguard Target Retirement 2035 Fund

        In connection with the Report on Form N-CSR of the above-named issuer that is accompanied by this certification, the undersigned hereby certifies, to his knowledge, that:

9. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

10. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the issuer.

Date: October 22, 2004	/s/ John J. Brennan
	John J. Brennan
	Chief Executive Officer

Certification Pursuant to 18 U.S.C. Section 1350,
As Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002

Name of Issuer: Vanguard Target Retirement 2035 Fund

        In connection with the Report on Form N-CSR of the above-named issuer that is accompanied by this certification, the undersigned hereby certifies, to his knowledge, that:

9. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

10. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the issuer.

Date: October 22, 2004	/s/ Thomas J. Higgins
	Thomas J. Higgins
	Treasurer

Certification Pursuant to 18 U.S.C. Section 1350,
As Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002

Name of Issuer: Vanguard Target Retirement 2045 Fund

        In connection with the Report on Form N-CSR of the above-named issuer that is accompanied by this certification, the undersigned hereby certifies, to his knowledge, that:

11. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

12. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the issuer.

Date: October 22, 2004	/s/ John J. Brennan
	John J. Brennan
	Chief Executive Officer

Certification Pursuant to 18 U.S.C. Section 1350,
As Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of 2002

Name of Issuer: Vanguard Target Retirement 2045 Fund

        In connection with the Report on Form N-CSR of the above-named issuer that is accompanied by this certification, the undersigned hereby certifies, to his knowledge, that:

11. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

12. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the issuer.

Date: October 22, 2004	/s/ Thomas J. Higgins
	Thomas J. Higgins
	Treasurer