<page_title> Mersenne prime </page_title> <section_title> List of known Mersenne primes </section_title> <table> <cell> 2 <col_header> p </col_header> </cell> <cell> 3 <col_header> Mp </col_header> </cell> <cell> 3 <col_header> p </col_header> </cell> <cell> 7 <col_header> Mp </col_header> </cell> <cell> 5 <col_header> p </col_header> </cell> <cell> 31 <col_header> Mp </col_header> </cell> <cell> 7 <col_header> p </col_header> </cell> <cell> 127 <col_header> Mp </col_header> </cell> </table>
The first four Mersenne primes are M₂ = 3, M₃ = 7, M₅ = 31 and M₇ = 127.