Cunningham Project

The Cunningham Project is a collaborative effort started in 1925 to factor numbers of the form bn ± 1 for b = 2, 3, 5, 6, 7, 10, 11, 12 and large n. The project is named after Allan Joseph Champneys Cunningham, who published the first version of the table together with Herbert J. Woodall. There are three printed versions of the table, the most recent published in 2002, as well as an online version by Samuel Wagstaff.

The current limits of the exponents are:

Base 2 3 5 6 7 10 11 12
Limit 1500 900 600 550 500 450 400 400
Aurifeuillean (LM) limit 3000 1800 1200 1100 1000 900 800 800
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