WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000843781
<NAME> DREYFUS TREASURY PRIME CASH MANAGEMENT- INVESTOR SHARES
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<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> JAN-31-2000
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<NUMBER-OF-SHARES-REDEEMED> (1435252)
<SHARES-REINVESTED> 5340
<NET-CHANGE-IN-ASSETS> (161084)
<ACCUMULATED-NII-PRIOR> 0
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<PER-SHARE-NAV-BEGIN> 1.00
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</TABLE>