After the numbers in the extension have been factored as thoroughly as the regular Cunningham numbers they will be added to the official tables.
The extensions to base 3 (from 601 to 800, LM to 1600), to base 5 (from 451 to 500, LM to 1000), to base 6 (from 401 to 450, LM to 900), to base 6 (from 451 to 500, LM to 1000), to base 11 (from 301 to 350, LM to 700), to base 12 (from 301 to 350, LM to 700), to base 3 (from 801 to 850, LM to 1700), to base 2 (from 1201 to 1300, LM to 2600), to base 5 (from 501 to 550, LM to 1100), to base 7 (from 401 to 450, LM to 900), and to base 2 (from 1301 to 1500, LM to 3000), that used to be on this page have been incorporated into the regular Cunningham tables.
The next entry gives the new main tables and Appendices A (large primes) and C (composite cofactors) for an extension to the Base 2 tables from 1300 to 1500, LM to 3000. (These have been incorporated into the main tables.)
Extension to Base 2 tables from 1300 to 1500, LM to 3000. - - - Appendix A: Large primes for Base 2 table extensions. - - - Appendix C: Composites for Base 2 table extensions. - - - Known factors not yet inserted.
The remainder of this page gives links to extensions made by others and also an unorganized list of new factors that people have sent me for numbers beyond the end of the official Cunningham tables. I think all factors from these extensions (in the appropriate range) have been included in the extensions above.
3LM table extension from 1200 to 1800, supplied by Paul Leyland.
Additional factors for assorted tables beyond the Cunningham limits of 1200 and 2400 for LM.
Some factors of Mersenne numbers found by Ryan Propper using ECM.
Additional factors for tables other than base 3 beyond the Cunningham limits found by J. Crombie.