How big is a "selfridge"? (primality testing) And is BPSW fastest for general nos?

johnnagelson@yahoo.co.uk1 · science forum beginner Joined: 22 Jun 2006 Posts: 1

Could someone please explain to me what the unit called a "selfridge"
is, in primality testing?

Does BPSW use 1 selfridge, or slightly more than 3 selfridges (1+ for
the 2-sprp test and 2 for the Lucas test), or some other amount?

Also, is BPSW the fastest known primality test for general numbers, up
to say 10^20??

Thanks!

John Nagelson

Google