56067...15433 (106-digits)

This number is a prime.

                                     560671 1279381880 7759090640 3103377727
6169702233 1786998848 3399360167 2446267509 6723055115 8901851145 4217415433

Just showing those entries submitted by 'Rupinski': (Click here to show all)

The product of the first 19 Mersenne exponents plus the product of the next 20 known exponents (as of September 2002) is prime. [Rupinski]