Prime Mining Announces Inclusion in the GDXJ

VANCOUVER, Dec. 20, 2021 - Prime Mining Corp. ("Prime", or the "Company") (TSX.V: PRYM) (OTCQB: PRMNF) (Frankfurt: O4V3) is pleased to announce that it has been added to the MVIS Global Junior Miners Index ("GDXJ") pursuant to the GDXJ's quarterly review and rebalancing for the fourth quarter, effective at the close of markets, December 17, 2021.

"We are extremely pleased to be included the GDXJ Index," stated CEO Daniel Kunz. "Prime's addition to the Index is yet another major milestone in the continued development of the Company, further raising our profile and awareness in the investment community, attracting trading flexibility and value to our investors."

About Prime Mining

Prime Mining (member of the TSX Venture 50) is an ideal mix of successful mining executives, strong capital markets personnel, and experienced local operators focused on unlocking the full potential of the high-grade Los Reyes Gold-Silver Project in Mexico. Prime Mining has a well-planned capital structure with significant team and insider ownership.

The TSX Venture 50 is a ranking of the top performers in each of 5 industry sectors on the TSX Venture Exchange over the last year.

ON BEHALF OF THE BOARD OF DIRECTORS

Daniel Kunz
Chief Executive Officer

For further information, please contact:

Daniel Kunz
Chief Executive Officer and Director
Prime Mining Corp.
1307 S. Colorado Ave.
Boise, Idaho 83706
Telephone: 1-208-926-6379 office
email: daniel@primeminingcorp.ca

Andrew Bowering
Executive Vice President and Director
Prime Mining Corp.
710 - 1030 West Georgia Street
Vancouver, BC, V6E 2Y3
Telephone: (604) 428-6128
Facsimile: (604) 428-6430
E: andy@primeminingcorp.ca

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Forward Looking Information

Information set forth in this document may include forward-looking statements. While these statements reflect management's current plans, projections, and intents, by their nature, forward-looking statements are subject to numerous risks and uncertainties, some of which are beyond the control of the Company. Readers are cautioned that the assumptions used in the preparation of such information, although considered reasonable at the time of preparation, may prove to be imprecise and, as such, undue reliance should not be placed on these forward-looking statements. There is no assurance the activities described in this release will be completed as planned, or at all. The Company's actual results, programs, activities, and financial position could differ materially from those expressed in or implied by these forward-looking statements.