509203 is the conjectured smallest Riesel number.
I searched 10^n+509203 up to 26000.

PFGW Version 1.2.0 for Windows [FFT v23.8]

Primality testing 10^24950+509203
[N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 2
Running N+1 test using discriminant 5, base 1+sqrt(5)
10^24950+509203 is Fermat and Lucas PRP!

To be completed...