[seqfan] Re: Proposal for "Big Numbers" paper

Andrew Weimholt andrew.weimholt at gmail.com
Sat Feb 22 22:25:49 CET 2014

Let's not forget

which is the period of A000790, the Primary Pretenders

see paper by

J. H. Conway, R. K. Guy, W. A. Schneeberger and N. J. A. Sloane, The
Primary Pretenders


quoting from their paper above...

"What is this number? Well, it's p!59p!9, where p!k is the product of the
first k primes, p1p2 ···pk. And where do p59 and p9 come from? p59 = 277 is
the largest possible prime factor, and p9 = 23 is the largest possible
repeated prime factor, of a composite number less than the Carmichael
number 561."


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