<page_title> Mersenne prime </page_title> <section_title> List of known Mersenne primes </section_title> <table> <cell> 5 <col_header> # </col_header> </cell> <cell> 13 <col_header> p </col_header> </cell> <cell> 8191 <col_header> Mp </col_header> </cell> <cell> Anonymous <col_header> Discoverer </col_header> </cell> <cell> 6 <col_header> # </col_header> </cell> <cell> 17 <col_header> p </col_header> </cell> <cell> 1588 <col_header> Discovered </col_header> </cell> <cell> Pietro Cataldi <col_header> Discoverer </col_header> </cell> <cell> 7 <col_header> # </col_header> </cell> <cell> 19 <col_header> p </col_header> </cell> <cell> 1588 <col_header> Discovered </col_header> </cell> <cell> Pietro Cataldi <col_header> Discoverer </col_header> </cell> </table>
Mersenne prime, the fifth M₁₃ = 8191, was discovered anonymously; the next two (M₁₇ and M₁₉) were found by Pietro Cataldi in 1588.