By PFGW, is Fermat (to base 137) and Lucas PRP.

Term a(27) in OEIS sequence number A057468, see
https://oeis.org/A057468

See also \"Primes of the form \"b^p-(b-1)^p\"
https://listserv.nodak.edu/cgi-bin/wa.exe?A2=NMBRTHRY;z8hSxQ;200105182342220400

To be completed...