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(Another of the Prime Pages' resources)
The Largest Known Primes Icon
 
The hardware and software on this system was updated September 4th.  Please let me know of any problem you encounter. <caldwell@utm.edu>

At the Prime Pages we keep a database of the 5,000 largest known primes (plus the top twenty of certain selected types). A commonly requested search is to find all of the primes of the form k.bn+/-1 with restrictions on k and n. This page is designed to make that easy.

Search Database of the Largest Known Primes
for primes of the form: k.bn+/-1
Base b base
Limit on multiplier k
(leave blank for no limit)
minimum
maximum
Limit on exponent n
(leave blank for no limit)
minimum
maximum
Which sign(s)? plus     minus
Find at most number
(other searches)