[seqfan] Why is 265 not a strong pseudoprime to base 54?
Alonso Del Arte
alonso.delarte at gmail.com
Wed Jul 18 21:36:53 CEST 2018
Why is 265 not a strong pseudoprime to base 54? It's not listed in
A020280, so there must be a good reason.
54^264 = 1 mod 265, but of course that's not enough to be a strong
pseudoprime. Since 264 = 8 * 33, I check that 54^32 = 1 mod 265. Did I
take a wrong turn somewhere?
Alonso del Arte
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