Sunday, 24 July 2011

Primes Generated by Alternating Factorials?

Found this one in an article by Richard Guy on the Strong Law of Small Numbers...


Is it always true?  Is even the next one true?



Spoiler (of sorts)

x
x
x
xx

xx
x
xx
x
x
x
Neil Calkin ‏@neil_calkin offers:
solutions for 3,4,5,6,7,8,10,15,19,41,59,61,105,160 no more small values.
Post a Comment