SECURITIES AND EXCHANGE COMMISSION

                             Washington, D. C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

          Date of Report (Date of earliest event reported) May 7, 2004



Commission        Registrant; State of Incorporation;          I.R.S. Employer
File Number           Address; and Telephone Number           Identification No.
-----------       -----------------------------------         -----------------

333-21011         FIRSTENERGY CORP.                              34-1843785
                  (An Ohio Corporation)
                  76 South Main Street
                  Akron, Ohio  44308
                  Telephone (800)736-3402





Item 7.  Financial Statements, Pro Forma Financial Statements and Exhibits
(c) Exhibits.

Exhibit No.    Description
-----------    -----------

   99.1        Press Release issued by FirstEnergy Corp., dated May 7, 2004
   99.2        Consolidated Report to the Financial Community, dated May 7, 2004

Item 12.  Results of Operations and Financial Condition

     On May 7, 2004,  FirstEnergy Corp. issued two public  announcements,  which
are attached as Exhibits  99.1, and 99.2 hereto and  incorporated  by reference.
FirstEnergy's  Press Release and Consolidated  Report to the Financial Community
contain non-GAAP financial measures.  Generally, a non-GAAP financial measure is
a numerical measure of a company's  historical or future financial  performance,
financial position,  or cash flows that either excludes or includes amounts that
are not normally  excluded or included in the most directly  comparable  measure
calculated  and presented in accordance  with  accounting  principles  generally
accepted  in the  United  States,  or  GAAP.  Pursuant  to the  requirements  of
Regulation G, FirstEnergy has provided quantitative  reconciliations  within the
Press Release and Consolidated Report to the Financial Community of the non-GAAP
financial measures to the most directly comparable GAAP financial measures.

     The  Press  Release  and  Consolidated  Report to the  Financial  Community
include  normalized  earnings per share,  which is not  calculated in accordance
with GAAP  because it excludes  the impact of  "unusual  items".  Unusual  items
reflect the impact on earnings  of events that are not  routine,  are related to
discontinued  businesses or are the cumulative  effect of an accounting  change.
Management  believes  presenting  normalized  earnings calculated in this manner
provides  useful  information to investors in evaluating the ongoing  results of
FirstEnergy's  businesses  and assists  investors  in  comparing  the  company's
operating  performance  to the  operating  performance  of others in the  energy
sector.  FirstEnergy's management frequently references these non-GAAP financial
measures in its decision-making, using them to facilitate historical and ongoing
performance  comparisons  as  well as  comparisons  to the  performance  of peer
companies.

     The non-GAAP  information  presented in the Press Release and  Consolidated
Report to the Financial  Community  should be considered in addition to, and not
as a substitute  for,  reported  earnings per share prepared in accordance  with
GAAP.

     Forward-Looking   Statement:   This  Form  8-K   includes   forward-looking
statements  based  on  information  currently  available  to  management.   Such
statements  are subject to certain  risks and  uncertainties.  These  statements
typically contain, but are not limited to, the terms "anticipate",  "potential",
"expect",  "believe",  "estimate" and similar  words.  Actual results may differ
materially due to the speed and nature of increased competition and deregulation
in the  electric  utility  industry,  economic or weather  conditions  affecting
future  sales and  margins,  changes in markets  for energy  services,  changing
energy and commodity  market prices,  replacement  power costs being higher than
anticipated  or  inadequately  hedged,   maintenance  costs  being  higher  than
anticipated, legislative and regulatory changes (including revised environmental
requirements),  adverse  regulatory  or  legal  decisions  and  the  outcome  of
governmental  investigations  (including  revocation  of  necessary  licenses or
operating   permits),   availability   and  cost  of  capital,   the  continuing
availability  and operation of generating  units, the inability to accomplish or
realize anticipated benefits of strategic goals, the ability to improve electric
commodity  margins and to experience  growth in the distribution  business,  the
ability to access the public securities markets,  further investigation into the
causes of the August 14, 2003,  regional power outage and the outcome,  cost and
other effects of present and potential legal and administrative  proceedings and
claims related to that outage,  a denial of or material change to  FirstEnergy's
Application  related to its Rate Stabilization Plan, the risks and other factors
discussed from time to time in FirstEnergy's  Securities and Exchange Commission
filings,  including its annual  report on Form 10-K for the year ended  December
31, 2003 and other similar factors.  FirstEnergy expressly disclaims any current
intention to update any forward-looking statements contained in this document as
a result of new information, future events, or otherwise.

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                                    SIGNATURE



     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.



May 7, 2004


                                                 FIRSTENERGY CORP.
                                                 -----------------
                                                    Registrant


                                              /s/  Harvey L. Wagner
                                         ---------------------------------
                                                   Harvey L. Wagner
                                               Vice President, Controller
                                              and Chief Accounting Officer


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