(10^11+1)*(10^23+1)*(10^419+1)*(10^106007+1)/11/(10^253+1)/(10^4609+1)/(10^9637+1)
http://www.factordb.com/index.php?id=1100000001288175739
https://stdkmd.net/nrr/repunit/prpfactors.htm

To be completed...