Document:

Exhibit 4.2

 

	NUMBER	 	 

    NUMBER

	 	 	C-
    [●]
	 	 	SHARES
	 	 	SEE
    REVERSE FOR CERTAIN DEFINITIONS
	 	 	CUSIP
    74168P107

 

PRIME NUMBER ACQUISITION I CORP.

INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE

CLASS A COMMON STOCK

 

This Certifies that

 

is the owner of

 

FULLY PAID AND NON-ASSESSABLE SHARES OF THE PAR
VALUE OF $0.0001 EACH OF THE CLASS A COMMON STOCK OF

 

PRIME NUMBER ACQUISITION I CORP.

(THE “CORPORATION”)

 

transferable on the books of the Corporation in
person or by duly authorized attorney upon surrender of this certificate properly endorsed.

 

The Corporation will be forced to redeem all of
its public shares of Class A common stock if it is unable to complete a business combination by [●], 2022, all as more fully
described in the Corporation’s final prospectus dated [●], 2022.

 

This certificate is not valid unless countersigned
by the Transfer Agent and registered by the Registrar.

 

Witness the seal of the Corporation and the facsimile
signatures of its duly authorized officers.

 

	Chief Executive Officer	[Corporate Seal]	Chief Financial Officer
	 	Delaware	 

 

    1

     

    

 

PRIME NUMBER ACQUISITION I CORP.

 

The Corporation will furnish
without charge to each stockholder who so requests the powers, designations, preferences and relative, participating, optional or other
special rights of each class of stock or series thereof of the Corporation and the qualifications, limitations, or restrictions of such
preferences and/or rights. This certificate and the shares represented thereby are issued and shall be held subject to all the provisions
of the Certificate of Incorporation and all amendments thereto and resolutions of the Board of Directors providing for the issue of securities
(copies of which may be obtained from the secretary of the Corporation), to all of which the holder of this certificate by acceptance
hereof assents. The following abbreviations, when used in the inscription on the face of this certificate, shall be construed as though
they were written out in full according to applicable laws or regulations:

 

	TEN COM	—	as tenants in common	UNIF GIFT MIN ACT	—	 	Custodian	 
	TEN ENT	—	as tenants by the entireties	 	 	(Cust)	 	(Minor)

	JT TEN	—	as joint tenants with right of survivorship and not as tenants in common	 	 	
    under Uniform Gifts to Minors Act

    (State)

 

Additional abbreviations may
also be used though not in the above list.

 

For value received, hereby
sells, assigns and transfers unto

 

(PLEASE INSERT SOCIAL SECURITY
OR OTHER IDENTIFYING NUMBER(S) OF ASSIGNEE(S))

 

(PLEASE PRINT OR TYPEWRITE
NAME(S) AND ADDRESS(ES), INCLUDING ZIP CODE, OF ASSIGNEE(S))

 

Shares of the capital stock
represented by the within Certificate, and hereby irrevocably constitutes and appoints

 

Attorney to transfer the said
stock on the books of the within named Corporation with full power of substitution in the premises.

 

    2

     

    

 

	Dated:	 
	 	 
	 	 

 

NOTICE: THE SIGNATURE(S) TO THIS ASSIGNMENT
MUST CORRESPOND WITH THE NAME AS WRITTEN UPON THE FACE OF THE CERTIFICATE IN EVERY PARTICULAR, WITHOUT ALTERATION OR ENLARGEMENT OR ANY
CHANGE WHATEVER.

	
     

    Signature(s) Guaranteed:
	 
	 	 
	By	 
	 	 
	 	 

 

THE SIGNATURE(S) MUST BE GUARANTEED BY AN
ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE
GUARANTEE MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15 (OR ANY SUCCESSOR RULE).

 

In each case, as more fully described in the Corporation’s
final prospectus dated [●], 2022, the holder(s) of this certificate shall be entitled to receive a pro-rata portion of certain
funds held in the trust account established in connection with its initial public offering only in the event that (i) the Corporation
redeems the shares of Class A common stock sold in the Company’s initial public offering and liquidates because it does not
consummate an initial business combination by [●], 2022, (ii) the Corporation redeems the shares of Class A common stock
sold in its initial public offering in connection with a stockholder vote (x) to amend the Corporation’s amended and restated
certificate of incorporation to modify the substance or timing of the Corporation’s obligation to redeem 100% of the Class A
common stock if it does not consummate an initial business combination by [●], 2022 or (y) with respect to any other provisions
relating to stockholders’ rights or pre-initial business combination activity, or (iii) if the holder(s) seek(s) to
redeem for cash his, her or its respective shares of Class A common stock in connection with a tender offer (or proxy solicitation,
solely in the event the Corporation seeks stockholder approval of the proposed initial business combination) setting forth the details
of a proposed initial business combination. In no other circumstances shall the holder(s) have any right or interest of any kind
in or to the trust account.

 

    3Exhibit 4.3

 

[FACE]

 

Number

 

Warrants

THIS WARRANT SHALL BE VOID IF NOT EXERCISED PRIOR
TO

THE EXPIRATION OF THE EXERCISE PERIOD PROVIDED FOR

 

IN THE WARRANT AGREEMENT DESCRIBED BELOW

PRIME NUMBER ACQUISITION I CORP.

 

Incorporated Under the Laws of the State of Delaware

 

CUSIP 74168P 115

 

Warrant Certificate

 

This Warrant Certificate
certifies that [ ], or registered assigns, is the registered holder of [ ] warrant(s) (the “Warrants” and each,
a “Warrant”) to purchase shares of Class A common stock, $0.0001 par value per share (“Class A
Common Stock”), of Prime Number Acquisition I Corp., a Delaware corporation (the “Company”). Each Warrant
entitles the holder, upon exercise during the period set forth in the Warrant Agreement referred to below, to receive from the Company
that number of fully paid and nonassessable shares of Class A Common Stock as set forth below, at the exercise price (the “Exercise
Price”) as determined pursuant to the Warrant Agreement, payable in lawful money (or through “cashless exercise”
as provided for in the Warrant Agreement) of the United States of America upon surrender of this Warrant Certificate and payment of the
Exercise Price at the office or agency of the Warrant Agent referred to below, subject to the conditions set forth herein and in the
Warrant Agreement. Defined terms used in this Warrant Certificate but not defined herein shall have the meanings given to them in the
Warrant Agreement.

 

Each whole Warrant is initially
exercisable for one fully paid and non-assessable share of Class A Common Stock. Fractional shares shall not be issued upon exercise
of any Warrant. If, upon the exercise of Warrants, a holder would be entitled to receive a fractional interest in a share, the Company
shall, upon exercise, round down to the nearest whole number the number of shares of Class A Common Stock to be issued to the Warrant
holder. The number of shares of Class A Common Stock issuable upon exercise of the Warrants is subject to adjustment upon the occurrence
of certain events as set forth in the Warrant Agreement.

 

The initial Exercise Price
per share of Class A Common Stock for any Warrant is equal to $11.50 per share. The Exercise Price is subject to adjustment upon
the occurrence of certain events as set forth in the Warrant Agreement.

 

Subject to the conditions
set forth in the Warrant Agreement, the Warrants may be exercised only during the Exercise Period and to the extent not exercised by
the end of such Exercise Period, such Warrants shall become void. The Warrants may be redeemed, subject to certain conditions, as set
forth in the Warrant Agreement.

 

    

     

    

 

Reference is hereby made
to the further provisions of this Warrant Certificate set forth on the reverse hereof and such further provisions shall for all purposes
have the same effect as though fully set forth at this place.

 

This Warrant Certificate
shall not be valid unless countersigned by the Warrant Agent, as such term is used in the Warrant Agreement.

 

This Warrant Certificate
shall be governed by and construed in accordance with the internal laws of the State of New York.

 

[Signature Page Follows]

 

    

     

    

 

	 	Prime Number Acquisition I Corp.
	 	 
	 	By:	
	 	Name:	Dongfeng Wang
	 	Title:	Chief Executive Officer
	 	 
	 	VStock Transfer LLC, as Warrant Agent
	 	 
	 	By:	
	 	Name:	Yoel Goldfeder
	 	Title:	Chief Executive Officer

 

[Signature Page to the Warrant Agreement
Exhibit A of Prime Number Acquisition I Corp.]

 

    

     

    

 

[Form of Warrant Certificate]

[Reverse]

 

The Warrants evidenced by
this Warrant Certificate are part of a duly authorized issue of Warrants entitling the holder on exercise to receive shares of Class A
Common Stock and are issued or to be issued pursuant to a Warrant Agreement dated as of [ ] (the “Warrant Agreement”),
duly executed and delivered by the Company to VStock Transfer, LLC, a California limited liability company, as warrant agent (the “Warrant
Agent”), which Warrant Agreement is hereby incorporated by reference in and made a part of this instrument and is hereby referred
to for a description of the rights, limitation of rights, obligations, duties and immunities thereunder of the Warrant Agent, the Company
and the holders (the words “holders” or “holder” meaning the Registered Holders or Registered Holder, respectively)
of the Warrants. A copy of the Warrant Agreement may be obtained by the holder hereof upon written request to the Company. Defined terms
used in this Warrant Certificate but not defined herein shall have the meanings given to them in the Warrant Agreement.

 

Warrants may be exercised
at any time during the Exercise Period set forth in the Warrant Agreement. The holder of Warrants evidenced by this Warrant Certificate
may exercise them by surrendering this Warrant Certificate, with the form of Election to Purchase set forth hereon properly completed
and executed, together with payment of the Exercise Price as specified in the Warrant Agreement (or through “cashless exercise”
as provided for in the Warrant Agreement) at the principal corporate trust office of the Warrant Agent. In the event that upon any exercise
of Warrants evidenced hereby the number of Warrants exercised shall be less than the total number of Warrants evidenced hereby, there
shall be issued to the holder hereof or his, her or its assignee, a new Warrant Certificate evidencing the number of Warrants not exercised.

 

Notwithstanding anything
else in this Warrant Certificate or the Warrant Agreement, no Warrant may be exercised unless at the time of exercise (i) a registration
statement covering the issuance of the shares of Class A Common Stock to be issued upon exercise is effective under the Securities
Act and (ii) a prospectus thereunder relating to the shares of Class A Common Stock is current, except through “cashless
exercise” as provided for in the Warrant Agreement.

 

The Warrant Agreement provides
that upon the occurrence of certain events the number of shares of Class A Common Stock issuable upon exercise of the Warrants set
forth on the face hereof may, subject to certain conditions, be adjusted. If, upon exercise of a Warrant, the holder thereof would be
entitled to receive a fractional interest in a share of Class A Common Stock, the Company shall, upon exercise, round down to the
nearest whole number of shares of Class A Common Stock to be issued to the holder of the Warrant.

 

Warrant Certificates, when
surrendered at the principal corporate trust office of the Warrant Agent by the Registered Holder thereof in person or by legal representative
or attorney duly authorized in writing, may be exchanged, in the manner and subject to the limitations provided in the Warrant Agreement,
but without payment of any service charge, for another Warrant Certificate or Warrant Certificates of like tenor evidencing in the aggregate
a like number of Warrants.

 

Upon due presentation for
registration of transfer of this Warrant Certificate at the office of the Warrant Agent a new Warrant Certificate or Warrant Certificates
of like tenor and evidencing in the aggregate a like number of Warrants shall be issued to the transferee(s) in exchange for this
Warrant Certificate, subject to the limitations provided in the Warrant Agreement, without charge except for any tax or other governmental
charge imposed in connection therewith.

 

    

     

    

 

The Company and the Warrant
Agent may deem and treat the Registered Holder(s) hereof as the absolute owner(s) of this Warrant Certificate (notwithstanding
any notation of ownership or other writing hereon made by anyone), for the purpose of any exercise hereof, of any distribution to the
holder(s) hereof, and for all other purposes, and neither the Company nor the Warrant Agent shall be affected by any notice to the
contrary. Neither the Warrants nor this Warrant Certificate entitles any holder hereof to any rights of a stockholder of the Company.

 

    

     

    

 

Election to Purchase

(To Be Executed Upon Exercise of Warrant)

 

The undersigned hereby irrevocably
elects to exercise the right, represented by this Warrant Certificate, to receive [  ] shares of Class A Common Stock and herewith
tenders payment for such shares of Class A Common Stock to the order of Prime Number Acquisition I Corp. (the “Company”)
in the amount of $[ ] in accordance with the terms hereof. The undersigned requests that a certificate for such shares of Class A
Common Stock be registered in the name of [  ], whose address is [  ] and that such shares of Class A Common Stock
be delivered to [  ] whose address is [  ]. If said [  ] number of shares of Class A Common Stock is less than
all of the shares of Class A Common Stock purchasable hereunder, the undersigned requests that a new Warrant Certificate representing
the remaining balance of such shares of Class A Common Stock be registered in the name of [ ], whose address is [  ] and
that such Warrant Certificate be delivered to [  ], whose address is [  ].

 

In the event that the Warrant
is to be exercised on a “cashless” basis pursuant to Section 7.4 of the Warrant Agreement, the number of shares of Class A
Common Stock that this Warrant is exercisable for shall be determined in accordance with Section 7.4 of the Warrant Agreement.

 

In the event that the Warrant
may be exercised, to the extent allowed by the Warrant Agreement, through cashless exercise (i) the number of shares of Class A
Common Stock that this Warrant is exercisable for would be determined in accordance with the relevant section of the Warrant Agreement
which allows for such cashless exercise and (ii) the holder hereof shall complete the following: The undersigned hereby irrevocably
elects to exercise the right, represented by this Warrant Certificate, through the cashless exercise provisions of the Warrant Agreement,
to receive shares of Class A Common Stock. If said number of shares is less than all of the shares of Class A Common Stock
purchasable hereunder (after giving effect to the cashless exercise), the undersigned requests that a new Warrant Certificate representing
the remaining balance of such shares of Class A Common Stock be registered in the name of [  ], whose address is [   ]
and that such Warrant Certificate be delivered to [  ], whose address is [  ].

 

[Signature Page Follows]

 

    

     

    

 

	Date: 	[  ], 20[ ]

 

	 	(Signature)
	 	 
	 	 
	 	 
	 	 
	 	(Address)
	 	 
	 	 
	 	(Tax Identification Number)
	 	 

Signature Guaranteed:

	 

 

THE SIGNATURE(S) SHOULD BE GUARANTEED BY
AN ELIGIBLE GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED
SIGNATURE GUARANTEE MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15 UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED).

 

[Signature Page to the Warrant Agreement
Election to Purchase of Prime Number Acquisition I Corp.]

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