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(37818 spells 'BIBLE' when turned upside down on a calculator.)

PFGW Version 1.2.0 for Windows [FFT v23.8]

Primality testing 10^20843+37818003
[N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 2
Running N-1 test using base 3
Running N+1 test using discriminant 7, base 1+sqrt(7)
10^20843+37818003 is Fermat and Lucas PRP!

To be completed...