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My Factor Collection -- \(a^n\pm1\)

(NOTE: This site is in the process of becoming multi-page. If you have any issues, you can still access the original page.)


This is currently a personal database of numbers of the form \(a^n\pm1\) based on my individual quirky interests. In the beginning of 2013 I took over management of the Brent-Montgomery-te Riele lists. There are ways to get reports on first holes and remaining composites. For the larger BMtR set, queries can be made based on number of digits up to 500. Over the years a lot of extra functionality has been added such as calculators and lists. The goal of the site is to turn around the "my" part of the title to refer to any visiting user. Even further down, the goal will be to have something fully peer-to-peer. Cheers.

Check out these other active overlapping DB sites:

Cunningham Project \(a^n \pm 1; a \in \{2, 3, 5, 6, 7, 10, 11, 12\}\)
GIMPS Project \(2^p - 1\)
ECMNET Project ecm factors >= 60 digits; Cunningham Project factors
Studio Kamada \(10^n \pm 1\)
FactorDB all factors (but use judgement when x-posting factors as it may be considered spam.)

"Use the force, Luke."

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